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Comparing deliantra/server/lib/cf.pm (file contents):
Revision 1.71 by root, Sun Oct 1 10:59:30 2006 UTC vs.
Revision 1.280 by root, Sat Jun 16 14:35:41 2007 UTC

1	package cf;	1	package cf;
		2
		3	use utf8;
		4	use strict;
2		5
3	use Symbol;	6	use Symbol;
4	use List::Util;	7	use List::Util;
		8	use Socket;
5	use Storable;	9	use Storable;
		10	use Event;
6	use Opcode;	11	use Opcode;
7	use Safe;	12	use Safe;
8	use Safe::Hole;	13	use Safe::Hole;
9		14
		15	use Coro 3.61 ();
		16	use Coro::State;
		17	use Coro::Handle;
		18	use Coro::Event;
		19	use Coro::Timer;
		20	use Coro::Signal;
		21	use Coro::Semaphore;
		22	use Coro::AIO;
		23	use Coro::Storable;
		24
		25	use BDB ();
		26	use Data::Dumper;
		27	use Digest::MD5;
		28	use Fcntl;
		29	use YAML::Syck ();
		30	use IO::AIO 2.32 ();
10	use Time::HiRes;	31	use Time::HiRes;
11	use Event;	32	use Compress::LZF;
		33
		34	# configure various modules to our taste
		35	#
		36	$Storable::canonical = 1; # reduce rsync transfers
		37	Coro::State::cctx_stacksize 256000; # 1-2MB stack, for deep recursions in maze generator
		38	Compress::LZF::sfreeze_cr { }; # prime Compress::LZF so it does not use require later
		39
12	$Event::Eval = 1; # no idea why this is required, but it is	40	$Event::Eval = 1; # no idea why this is required, but it is
13		41
14	use strict;	42	# work around bug in YAML::Syck - bad news for perl6, will it be as broken wrt. unicode?
		43	$YAML::Syck::ImplicitUnicode = 1;
15		44
16	_init_vars;	45	$Coro::main->prio (Coro::PRIO_MAX); # run main coroutine ("the server") with very high priority
17		46
		47	sub WF_AUTOCANCEL () { 1 } # automatically cancel this watcher on reload
		48
18	our %COMMAND = ();	49	our %COMMAND = ();
		50	our %COMMAND_TIME = ();
		51
		52	our @EXTS = (); # list of extension package names
		53	our %EXTCMD = ();
		54	our %EXT_CORO = (); # coroutines bound to extensions
		55	our %EXT_MAP = (); # pluggable maps
		56
		57	our $RELOAD; # number of reloads so far
19	our @EVENT;	58	our @EVENT;
20	our $LIBDIR = maps_directory "perl";
21		59
22	our $TICK = MAX_TIME * 1e-6;	60	our $CONFDIR = confdir;
		61	our $DATADIR = datadir;
		62	our $LIBDIR = "$DATADIR/ext";
		63	our $PODDIR = "$DATADIR/pod";
		64	our $MAPDIR = "$DATADIR/" . mapdir;
		65	our $LOCALDIR = localdir;
		66	our $TMPDIR = "$LOCALDIR/" . tmpdir;
		67	our $UNIQUEDIR = "$LOCALDIR/" . uniquedir;
		68	our $PLAYERDIR = "$LOCALDIR/" . playerdir;
		69	our $RANDOMDIR = "$LOCALDIR/random";
		70	our $BDBDIR = "$LOCALDIR/db";
		71
		72	our $TICK = MAX_TIME * 1e-6; # this is a CONSTANT(!)
23	our $TICK_WATCHER;	73	our $TICK_WATCHER;
		74	our $AIO_POLL_WATCHER;
		75	our $NEXT_RUNTIME_WRITE; # when should the runtime file be written
24	our $NEXT_TICK;	76	our $NEXT_TICK;
		77	our $NOW;
		78	our $USE_FSYNC = 1; # use fsync to write maps - default off
		79
		80	our $BDB_POLL_WATCHER;
		81	our $DB_ENV;
25		82
26	our %CFG;	83	our %CFG;
27		84
		85	our $UPTIME; $UPTIME ||= time;
		86	our $RUNTIME;
		87
		88	our %PLAYER; # all users
		89	our %MAP; # all maps
		90	our $LINK_MAP; # the special {link} map, which is always available
		91
		92	# used to convert map paths into valid unix filenames by replacing / by ∕
		93	our $PATH_SEP = "∕"; # U+2215, chosen purely for visual reasons
		94
		95	our $LOAD; # a number between 0 (idle) and 1 (too many objects)
		96	our $LOADAVG; # same thing, but with alpha-smoothing
		97	our $tick_start; # for load detecting purposes
		98
		99	binmode STDOUT;
		100	binmode STDERR;
		101
		102	# read virtual server time, if available
		103	unless ($RUNTIME || !-e "$LOCALDIR/runtime") {
		104	open my $fh, "<", "$LOCALDIR/runtime"
		105	or die "unable to read runtime file: $!";
		106	$RUNTIME = <$fh> + 0.;
		107	}
		108
		109	mkdir $_
		110	for $LOCALDIR, $TMPDIR, $UNIQUEDIR, $PLAYERDIR, $RANDOMDIR, $BDBDIR;
		111
		112	our $EMERGENCY_POSITION;
		113
		114	sub cf::map::normalise;
		115
28	#############################################################################	116	#############################################################################
29		117
30	=head2 GLOBAL VARIABLES	118	=head2 GLOBAL VARIABLES
31		119
32	=over 4	120	=over 4
33		121
34	=item $cf::LIBDIR	122	=item $cf::UPTIME
35		123
36	The perl library directory, where extensions and cf-specific modules can	124	The timestamp of the server start (so not actually an uptime).
37	be found. It will be added to C<@INC> automatically.	125
		126	=item $cf::RUNTIME
		127
		128	The time this server has run, starts at 0 and is increased by $cf::TICK on
		129	every server tick.
		130
		131	=item $cf::CONFDIR $cf::DATADIR $cf::LIBDIR $cf::PODDIR
		132	$cf::MAPDIR $cf::LOCALDIR $cf::TMPDIR $cf::UNIQUEDIR
		133	$cf::PLAYERDIR $cf::RANDOMDIR $cf::BDBDIR
		134
		135	Various directories - "/etc", read-only install directory, perl-library
		136	directory, pod-directory, read-only maps directory, "/var", "/var/tmp",
		137	unique-items directory, player file directory, random maps directory and
		138	database environment.
		139
		140	=item $cf::NOW
		141
		142	The time of the last (current) server tick.
38		143
39	=item $cf::TICK	144	=item $cf::TICK
40		145
41	The interval between server ticks, in seconds.	146	The interval between server ticks, in seconds.
		147
		148	=item $cf::LOADAVG
		149
		150	The current CPU load on the server (alpha-smoothed), as a value between 0
		151	(none) and 1 (overloaded), indicating how much time is spent on processing
		152	objects per tick. Healthy values are < 0.5.
		153
		154	=item $cf::LOAD
		155
		156	The raw value load value from the last tick.
42		157
43	=item %cf::CFG	158	=item %cf::CFG
44		159
45	Configuration for the server, loaded from C</etc/crossfire/config>, or	160	Configuration for the server, loaded from C</etc/crossfire/config>, or
46	from wherever your confdir points to.	161	from wherever your confdir points to.
		162
		163	=item cf::wait_for_tick, cf::wait_for_tick_begin
		164
		165	These are functions that inhibit the current coroutine one tick. cf::wait_for_tick_begin only
		166	returns directly I<after> the tick processing (and consequently, can only wake one process
		167	per tick), while cf::wait_for_tick wakes up all waiters after tick processing.
47		168
48	=back	169	=back
49		170
50	=cut	171	=cut
51		172
52	BEGIN {	173	BEGIN {
53	*CORE::GLOBAL::warn = sub {	174	*CORE::GLOBAL::warn = sub {
54	my $msg = join "", @_;	175	my $msg = join "", @_;
		176
55	$msg .= "\n"	177	$msg .= "\n"
56	unless $msg =~ /\n$/;	178	unless $msg =~ /\n$/;
57		179
58	print STDERR "cfperl: $msg";	180	$msg =~ s/([\x00-\x08\x0b-\x1f])/sprintf "\\x%02x", ord $1/ge;
		181
		182	utf8::encode $msg;
59	LOG llevError, "cfperl: $msg";	183	LOG llevError, $msg;
60	};	184	};
61	}	185	}
62		186
		187	@safe::cf::global::ISA = @cf::global::ISA = 'cf::attachable';
		188	@safe::cf::object::ISA = @cf::object::ISA = 'cf::attachable';
		189	@safe::cf::player::ISA = @cf::player::ISA = 'cf::attachable';
		190	@safe::cf::client::ISA = @cf::client::ISA = 'cf::attachable';
		191	@safe::cf::map::ISA = @cf::map::ISA = 'cf::attachable';
		192	@safe::cf::arch::ISA = @cf::arch::ISA = 'cf::object';
63	@safe::cf::object::player::ISA = @cf::object::player::ISA = 'cf::object';	193	@safe::cf::object::player::ISA = @cf::object::player::ISA = 'cf::object'; # not really true (yet)
64		194
65	# we bless all objects into (empty) derived classes to force a method lookup	195	# we bless all objects into (empty) derived classes to force a method lookup
66	# within the Safe compartment.	196	# within the Safe compartment.
67	for my $pkg (qw(cf::object cf::object::player cf::player cf::map cf::party cf::region cf::arch cf::living)) {	197	for my $pkg (qw(
		198	cf::global cf::attachable
		199	cf::object cf::object::player
		200	cf::client cf::player
		201	cf::arch cf::living
		202	cf::map cf::party cf::region
		203	)) {
68	no strict 'refs';	204	no strict 'refs';
69	@{"safe::$pkg\::wrap::ISA"} = @{"$pkg\::wrap::ISA"} = $pkg;	205	@{"safe::$pkg\::wrap::ISA"} = @{"$pkg\::wrap::ISA"} = $pkg;
70	}	206	}
71		207
72	$Event::DIED = sub {	208	$Event::DIED = sub {
73	warn "error in event callback: @_";	209	warn "error in event callback: @_";
74	};	210	};
75		211
76	my %ext_pkg;
77	my @exts;
78	my @hook;
79	my %command;
80	my %extcmd;
81
82	=head2 UTILITY FUNCTIONS	212	=head2 UTILITY FUNCTIONS
83		213
84	=over 4	214	=over 4
85		215
86	=cut	216	=item dumpval $ref
87		217
		218	=cut
		219
		220	sub dumpval {
		221	eval {
		222	local $SIG{__DIE__};
		223	my $d;
		224	if (1) {
		225	$d = new Data::Dumper([$_[0]], ["*var"]);
		226	$d->Terse(1);
		227	$d->Indent(2);
		228	$d->Quotekeys(0);
		229	$d->Useqq(1);
		230	#$d->Bless(...);
		231	$d->Seen($_[1]) if @_ > 1;
		232	$d = $d->Dump();
		233	}
		234	$d =~ s/([\x00-\x07\x09\x0b\x0c\x0e-\x1f])/sprintf "\\x%02x", ord($1)/ge;
		235	$d
		236	} || "[unable to dump $_[0]: '$@']";
		237	}
		238
88	use JSON::Syck (); # TODO# replace by JSON::PC once working	239	use JSON::XS qw(to_json from_json); # TODO# replace by JSON::PC once working
89		240
90	=item $ref = cf::from_json $json	241	=item $ref = cf::from_json $json
91		242
92	Converts a JSON string into the corresponding perl data structure.	243	Converts a JSON string into the corresponding perl data structure.
93		244
94	=cut
95
96	sub from_json($) {
97	$JSON::Syck::ImplicitUnicode = 1; # work around JSON::Syck bugs
98	JSON::Syck::Load $_[0]
99	}
100
101	=item $json = cf::to_json $ref	245	=item $json = cf::to_json $ref
102		246
103	Converts a perl data structure into its JSON representation.	247	Converts a perl data structure into its JSON representation.
104		248
105	=cut	249	=item cf::lock_wait $string
106		250
107	sub to_json($) {	251	Wait until the given lock is available. See cf::lock_acquire.
108	$JSON::Syck::ImplicitUnicode = 0; # work around JSON::Syck bugs	252
109	JSON::Syck::Dump $_[0]	253	=item my $lock = cf::lock_acquire $string
		254
		255	Wait until the given lock is available and then acquires it and returns
		256	a Coro::guard object. If the guard object gets destroyed (goes out of scope,
		257	for example when the coroutine gets canceled), the lock is automatically
		258	returned.
		259
		260	Lock names should begin with a unique identifier (for example, cf::map::find
		261	uses map_find and cf::map::load uses map_load).
		262
		263	=item $locked = cf::lock_active $string
		264
		265	Return true if the lock is currently active, i.e. somebody has locked it.
		266
		267	=cut
		268
		269	our %LOCK;
		270
		271	sub lock_wait($) {
		272	my ($key) = @_;
		273
		274	# wait for lock, if any
		275	while ($LOCK{$key}) {
		276	push @{ $LOCK{$key} }, $Coro::current;
		277	Coro::schedule;
		278	}
		279	}
		280
		281	sub lock_acquire($) {
		282	my ($key) = @_;
		283
		284	# wait, to be sure we are not locked
		285	lock_wait $key;
		286
		287	$LOCK{$key} = [];
		288
		289	Coro::guard {
		290	# wake up all waiters, to be on the safe side
		291	$_->ready for @{ delete $LOCK{$key} };
		292	}
		293	}
		294
		295	sub lock_active($) {
		296	my ($key) = @_;
		297
		298	! ! $LOCK{$key}
		299	}
		300
		301	sub freeze_mainloop {
		302	return unless $TICK_WATCHER->is_active;
		303
		304	my $guard = Coro::guard {
		305	$TICK_WATCHER->start;
		306	};
		307	$TICK_WATCHER->stop;
		308	$guard
		309	}
		310
		311	=item cf::async { BLOCK }
		312
		313	Currently the same as Coro::async_pool, meaning you cannot use
		314	C<on_destroy>, C<join> or other gimmicks on these coroutines. The only
		315	thing you are allowed to do is call C<prio> on it.
		316
		317	=cut
		318
		319	BEGIN { *async = \&Coro::async_pool }
		320
		321	=item cf::sync_job { BLOCK }
		322
		323	The design of crossfire+ requires that the main coro ($Coro::main) is
		324	always able to handle events or runnable, as crossfire+ is only partly
		325	reentrant. Thus "blocking" it by e.g. waiting for I/O is not acceptable.
		326
		327	If it must be done, put the blocking parts into C<sync_job>. This will run
		328	the given BLOCK in another coroutine while waiting for the result. The
		329	server will be frozen during this time, so the block should either finish
		330	fast or be very important.
		331
		332	=cut
		333
		334	sub sync_job(&) {
		335	my ($job) = @_;
		336
		337	if ($Coro::current == $Coro::main) {
		338	my $time = Event::time;
		339
		340	# this is the main coro, too bad, we have to block
		341	# till the operation succeeds, freezing the server :/
		342
		343	# TODO: use suspend/resume instead
		344	# (but this is cancel-safe)
		345	my $freeze_guard = freeze_mainloop;
		346
		347	my $busy = 1;
		348	my @res;
		349
		350	(async {
		351	@res = eval { $job->() };
		352	warn $@ if $@;
		353	undef $busy;
		354	})->prio (Coro::PRIO_MAX);
		355
		356	while ($busy) {
		357	Coro::cede or Event::one_event;
		358	}
		359
		360	$time = Event::time - $time;
		361
		362	LOG llevError | logBacktrace, Carp::longmess "long sync job"
		363	if $time > $TICK * 0.5 && $TICK_WATCHER->is_active;
		364
		365	$tick_start += $time; # do not account sync jobs to server load
		366
		367	wantarray ? @res : $res[0]
		368	} else {
		369	# we are in another coroutine, how wonderful, everything just works
		370
		371	$job->()
		372	}
		373	}
		374
		375	=item $coro = cf::async_ext { BLOCK }
		376
		377	Like async, but this coro is automatically being canceled when the
		378	extension calling this is being unloaded.
		379
		380	=cut
		381
		382	sub async_ext(&) {
		383	my $cb = shift;
		384
		385	my $coro = &Coro::async ($cb);
		386
		387	$coro->on_destroy (sub {
		388	delete $EXT_CORO{$coro+0};
		389	});
		390	$EXT_CORO{$coro+0} = $coro;
		391
		392	$coro
		393	}
		394
		395	sub write_runtime {
		396	my $runtime = "$LOCALDIR/runtime";
		397
		398	# first touch the runtime file to show we are still running:
		399	# the fsync below can take a very very long time.
		400
		401	IO::AIO::aio_utime $runtime, undef, undef;
		402
		403	my $guard = cf::lock_acquire "write_runtime";
		404
		405	my $fh = aio_open "$runtime~", O_WRONLY | O_CREAT, 0644
		406	or return;
		407
		408	my $value = $cf::RUNTIME + 90 + 10;
		409	# 10 is the runtime save interval, for a monotonic clock
		410	# 60 allows for the watchdog to kill the server.
		411
		412	(aio_write $fh, 0, (length $value), $value, 0) <= 0
		413	and return;
		414
		415	# always fsync - this file is important
		416	aio_fsync $fh
		417	and return;
		418
		419	# touch it again to show we are up-to-date
		420	aio_utime $fh, undef, undef;
		421
		422	close $fh
		423	or return;
		424
		425	aio_rename "$runtime~", $runtime
		426	and return;
		427
		428	warn "runtime file written.\n";
		429
		430	1
		431	}
		432
		433	=item cf::datalog type => key => value, ...
		434
		435	Log a datalog packet of the given type with the given key-value pairs.
		436
		437	=cut
		438
		439	sub datalog($@) {
		440	my ($type, %kv) = @_;
		441	warn "DATALOG ", JSON::XS->new->ascii->encode ({ %kv, type => $type });
110	}	442	}
111		443
112	=back	444	=back
113		445
114	=cut	446	=cut
115		447
116	#############################################################################	448	#############################################################################
117		449
118	=head2 EVENTS AND OBJECT ATTACHMENTS	450	=head2 ATTACHABLE OBJECTS
		451
		452	Many objects in crossfire are so-called attachable objects. That means you can
		453	attach callbacks/event handlers (a collection of which is called an "attachment")
		454	to it. All such attachable objects support the following methods.
		455
		456	In the following description, CLASS can be any of C<global>, C<object>
		457	C<player>, C<client> or C<map> (i.e. the attachable objects in
		458	crossfire+).
119		459
120	=over 4	460	=over 4
121		461
122	=item $object->attach ($attachment, key => $value...)
123
124	=item $object->detach ($attachment)
125
126	Attach/detach a pre-registered attachment to an object.
127
128	=item $player->attach ($attachment, key => $value...)
129
130	=item $player->detach ($attachment)
131
132	Attach/detach a pre-registered attachment to a player.
133
134	=item $map->attach ($attachment, key => $value...)	462	=item $attachable->attach ($attachment, key => $value...)
135		463
136	=item $map->detach ($attachment)	464	=item $attachable->detach ($attachment)
137		465
138	Attach/detach a pre-registered attachment to a map.	466	Attach/detach a pre-registered attachment to a specific object and give it
		467	the specified key/value pairs as arguments.
139		468
140	=item $bool = $object->attached ($name)	469	Example, attach a minesweeper attachment to the given object, making it a
		470	10x10 minesweeper game:
141		471
142	=item $bool = $player->attached ($name)	472	$obj->attach (minesweeper => width => 10, height => 10);
143		473
144	=item $bool = $map->attached ($name)	474	=item $bool = $attachable->attached ($name)
145		475
146	Checks wether the named attachment is currently attached to the object.	476	Checks wether the named attachment is currently attached to the object.
147		477
148	=item cf::attach_global ...	478	=item cf::CLASS->attach ...
149		479
150	Attach handlers for global events.	480	=item cf::CLASS->detach ...
151		481
152	This and all following C<attach_*>-functions expect any number of the	482	Define an anonymous attachment and attach it to all objects of the given
153	following handler/hook descriptions:	483	CLASS. See the next function for an explanation of its arguments.
		484
		485	You can attach to global events by using the C<cf::global> class.
		486
		487	Example, log all player logins:
		488
		489	cf::player->attach (
		490	on_login => sub {
		491	my ($pl) = @_;
		492	...
		493	},
		494	);
		495
		496	Example, attach to the jeweler skill:
		497
		498	cf::object->attach (
		499	type => cf::SKILL,
		500	subtype => cf::SK_JEWELER,
		501	on_use_skill => sub {
		502	my ($sk, $ob, $part, $dir, $msg) = @_;
		503	...
		504	},
		505	);
		506
		507	=item cf::CLASS::attachment $name, ...
		508
		509	Register an attachment by C<$name> through which attachable objects of the
		510	given CLASS can refer to this attachment.
		511
		512	Some classes such as crossfire maps and objects can specify attachments
		513	that are attached at load/instantiate time, thus the need for a name.
		514
		515	These calls expect any number of the following handler/hook descriptions:
154		516
155	=over 4	517	=over 4
156		518
157	=item prio => $number	519	=item prio => $number
158		520
…		…
160	by another C<prio> setting). Lower priority handlers get executed	522	by another C<prio> setting). Lower priority handlers get executed
161	earlier. The default priority is C<0>, and many built-in handlers are	523	earlier. The default priority is C<0>, and many built-in handlers are
162	registered at priority C<-1000>, so lower priorities should not be used	524	registered at priority C<-1000>, so lower priorities should not be used
163	unless you know what you are doing.	525	unless you know what you are doing.
164		526
		527	=item type => $type
		528
		529	(Only for C<< cf::object->attach >> calls), limits the attachment to the
		530	given type of objects only (the additional parameter C<subtype> can be
		531	used to further limit to the given subtype).
		532
165	=item on_I<event> => \&cb	533	=item on_I<event> => \&cb
166		534
167	Call the given code reference whenever the named event happens (event is	535	Call the given code reference whenever the named event happens (event is
168	something like C<instantiate>, C<apply>, C<use_skill> and so on, and which	536	something like C<instantiate>, C<apply>, C<use_skill> and so on, and which
169	handlers are recognised generally depends on the type of object these	537	handlers are recognised generally depends on the type of object these
…		…
178	package and register them. Only handlers for eevents supported by the	546	package and register them. Only handlers for eevents supported by the
179	object/class are recognised.	547	object/class are recognised.
180		548
181	=back	549	=back
182		550
183	=item cf::attach_to_type $object_type, $subtype, ...	551	Example, define an attachment called "sockpuppet" that calls the given
		552	event handler when a monster attacks:
184		553
185	Attach handlers for a specific object type (e.g. TRANSPORT) and	554	cf::object::attachment sockpuppet =>
186	subtype. If C<$subtype> is zero or undef, matches all objects of the given	555	on_skill_attack => sub {
187	type.	556	my ($self, $victim) = @_;
188		557	...
189	=item cf::attach_to_objects ...
190
191	Attach handlers to all objects. Do not use this except for debugging or
192	very rare events, as handlers are (obviously) called for I<all> objects in
193	the game.
194
195	=item cf::attach_to_players ...
196
197	Attach handlers to all players.
198
199	=item cf::attach_to_maps ...
200
201	Attach handlers to all maps.
202
203	=item cf:register_attachment $name, ...
204
205	Register an attachment by name through which objects can refer to this
206	attachment.
207
208	=item cf:register_player_attachment $name, ...
209
210	Register an attachment by name through which players can refer to this
211	attachment.
212
213	=item cf:register_map_attachment $name, ...
214
215	Register an attachment by name through which maps can refer to this
216	attachment.
217
218	=cut
219
220	# the following variables are defined in .xs and must not be re-created
221	our @CB_GLOBAL = (); # registry for all global events
222	our @CB_OBJECT = (); # all objects (should not be used except in emergency)
223	our @CB_PLAYER = ();
224	our @CB_TYPE = (); # registry for type (cf-object class) based events
225	our @CB_MAP = ();
226
227	my %attachment;
228
229	sub _attach_cb($\%$$$) {
230	my ($registry, $undo, $event, $prio, $cb) = @_;
231
232	use sort 'stable';
233
234	$cb = [$prio, $cb];
235
236	@{$registry->[$event]} = sort
237	{ $a->[0] cmp $b->[0] }
238	@{$registry->[$event] || []}, $cb;
239
240	push @{$undo->{cb}}, [$event, $cb];
241	}
242
243	# attach handles attaching event callbacks
244	# the only thing the caller has to do is pass the correct
245	# registry (== where the callback attaches to).
246	sub _attach(\@$@) {
247	my ($registry, $klass, @arg) = @_;
248
249	my $prio = 0;
250
251	my %undo = (
252	registry => $registry,
253	cb => [],
254	);
255
256	my %cb_id = map +("on_" . lc $EVENT[$_][0], $_) , grep $EVENT[$_][1] == $klass, 0 .. $#EVENT;
257
258	while (@arg) {
259	my $type = shift @arg;
260
261	if ($type eq "prio") {
262	$prio = shift @arg;
263
264	} elsif ($type eq "package") {
265	my $pkg = shift @arg;
266
267	while (my ($name, $id) = each %cb_id) {
268	if (my $cb = $pkg->can ($name)) {
269	_attach_cb $registry, %undo, $id, $prio, $cb;
270	}
271	}	558	}
272
273	} elsif (exists $cb_id{$type}) {
274	_attach_cb $registry, %undo, $cb_id{$type}, $prio, shift @arg;
275
276	} elsif (ref $type) {
277	warn "attaching objects not supported, ignoring.\n";
278
279	} else {
280	shift @arg;
281	warn "attach argument '$type' not supported, ignoring.\n";
282	}
283	}
284
285	\%undo
286	}
287
288	sub _attach_attachment {
289	my ($obj, $name, %arg) = @_;
290
291	return if exists $obj->{_attachment}{$name};
292
293	my $res;
294
295	if (my $attach = $attachment{$name}) {
296	my $registry = $obj->registry;
297
298	for (@$attach) {
299	my ($klass, @attach) = @$_;
300	$res = _attach @$registry, $klass, @attach;
301	}
302
303	$obj->{$name} = \%arg;
304	} else {
305	warn "object uses attachment '$name' that is not available, postponing.\n";
306	}
307
308	$obj->{_attachment}{$name} = undef;
309
310	$res->{attachment} = $name;
311	$res
312	}
313
314	*cf::object::attach =
315	*cf::player::attach =
316	*cf::map::attach = sub {
317	my ($obj, $name, %arg) = @_;
318
319	_attach_attachment $obj, $name, %arg;
320	};
321
322	# all those should be optimised
323	*cf::object::detach =
324	*cf::player::detach =
325	*cf::map::detach = sub {
326	my ($obj, $name) = @_;
327
328	delete $obj->{_attachment}{$name};
329	reattach ($obj);
330	};
331
332	*cf::object::attached =
333	*cf::player::attached =
334	*cf::map::attached = sub {
335	my ($obj, $name) = @_;
336
337	exists $obj->{_attachment}{$name}
338	};
339
340	sub attach_global {
341	_attach @CB_GLOBAL, KLASS_GLOBAL, @_
342	}
343
344	sub attach_to_type {
345	my $type = shift;
346	my $subtype = shift;
347
348	_attach @{$CB_TYPE[$type + $subtype * NUM_SUBTYPES]}, KLASS_OBJECT, @_
349	}
350
351	sub attach_to_objects {
352	_attach @CB_OBJECT, KLASS_OBJECT, @_
353	}
354
355	sub attach_to_players {
356	_attach @CB_PLAYER, KLASS_PLAYER, @_
357	}
358
359	sub attach_to_maps {
360	_attach @CB_MAP, KLASS_MAP, @_
361	}
362
363	sub register_attachment {
364	my $name = shift;
365
366	$attachment{$name} = [[KLASS_OBJECT, @_]];
367	}
368
369	sub register_player_attachment {
370	my $name = shift;
371
372	$attachment{$name} = [[KLASS_PLAYER, @_]];
373	}
374
375	sub register_map_attachment {
376	my $name = shift;
377
378	$attachment{$name} = [[KLASS_MAP, @_]];
379	}
380
381	our $override;
382	our @invoke_results = (); # referenced from .xs code. TODO: play tricks with reify and mortals?
383
384	sub override {
385	$override = 1;
386	@invoke_results = ();
387	}
388
389	sub do_invoke {
390	my $event = shift;
391	my $callbacks = shift;
392
393	@invoke_results = ();
394
395	local $override;
396
397	for (@$callbacks) {
398	eval { &{$_->[1]} };
399
400	if ($@) {
401	warn "$@";
402	warn "... while processing $EVENT[$event][0](@_) event, skipping processing altogether.\n";
403	override;
404	}
405
406	return 1 if $override;
407	}
408
409	0	559	}
410	}
411		560
412	=item $bool = cf::invoke EVENT_GLOBAL_XXX, ...	561	=item $attachable->valid
413
414	=item $bool = $object->invoke (EVENT_OBJECT_XXX, ...)
415
416	=item $bool = $player->invoke (EVENT_PLAYER_XXX, ...)
417
418	=item $bool = $map->invoke (EVENT_MAP_XXX, ...)
419
420	Generate a global/object/player/map-specific event with the given arguments.
421
422	This API is preliminary (most likely, the EVENT_KLASS_xxx prefix will be
423	removed in future versions), and there is no public API to access override
424	results (if you must, access C<@cf::invoke_results> directly).
425
426	=back
427
428	=cut
429
430	#############################################################################
431
432	=head2 METHODS VALID FOR ALL CORE OBJECTS
433
434	=over 4
435
436	=item $object->valid, $player->valid, $map->valid
437		562
438	Just because you have a perl object does not mean that the corresponding	563	Just because you have a perl object does not mean that the corresponding
439	C-level object still exists. If you try to access an object that has no	564	C-level object still exists. If you try to access an object that has no
440	valid C counterpart anymore you get an exception at runtime. This method	565	valid C counterpart anymore you get an exception at runtime. This method
441	can be used to test for existence of the C object part without causing an	566	can be used to test for existence of the C object part without causing an
442	exception.	567	exception.
443		568
		569	=cut
		570
		571	# the following variables are defined in .xs and must not be re-created
		572	our @CB_GLOBAL = (); # registry for all global events
		573	our @CB_ATTACHABLE = (); # registry for all attachables
		574	our @CB_OBJECT = (); # all objects (should not be used except in emergency)
		575	our @CB_PLAYER = ();
		576	our @CB_CLIENT = ();
		577	our @CB_TYPE = (); # registry for type (cf-object class) based events
		578	our @CB_MAP = ();
		579
		580	my %attachment;
		581
		582	sub cf::attachable::thawer_merge {
		583	# simply override everything except _meta
		584	local $_[0]{_meta};
		585	%{$_[0]} = %{$_[1]};
		586	}
		587
		588	sub _attach_cb($$$$) {
		589	my ($registry, $event, $prio, $cb) = @_;
		590
		591	use sort 'stable';
		592
		593	$cb = [$prio, $cb];
		594
		595	@{$registry->[$event]} = sort
		596	{ $a->[0] cmp $b->[0] }
		597	@{$registry->[$event] || []}, $cb;
		598	}
		599
		600	# hack
		601	my %attachable_klass = map +($_ => 1), KLASS_OBJECT, KLASS_CLIENT, KLASS_PLAYER, KLASS_MAP;
		602
		603	# attach handles attaching event callbacks
		604	# the only thing the caller has to do is pass the correct
		605	# registry (== where the callback attaches to).
		606	sub _attach {
		607	my ($registry, $klass, @arg) = @_;
		608
		609	my $object_type;
		610	my $prio = 0;
		611	my %cb_id = map +("on_" . lc $EVENT[$_][0], $_) , grep $EVENT[$_][1] == $klass, 0 .. $#EVENT;
		612
		613	#TODO: get rid of this hack
		614	if ($attachable_klass{$klass}) {
		615	%cb_id = (%cb_id, map +("on_" . lc $EVENT[$_][0], $_) , grep $EVENT[$_][1] == KLASS_ATTACHABLE, 0 .. $#EVENT);
		616	}
		617
		618	while (@arg) {
		619	my $type = shift @arg;
		620
		621	if ($type eq "prio") {
		622	$prio = shift @arg;
		623
		624	} elsif ($type eq "type") {
		625	$object_type = shift @arg;
		626	$registry = $CB_TYPE[$object_type] ||= [];
		627
		628	} elsif ($type eq "subtype") {
		629	defined $object_type or Carp::croak "subtype specified without type";
		630	my $object_subtype = shift @arg;
		631	$registry = $CB_TYPE[$object_type + $object_subtype * NUM_TYPES] ||= [];
		632
		633	} elsif ($type eq "package") {
		634	my $pkg = shift @arg;
		635
		636	while (my ($name, $id) = each %cb_id) {
		637	if (my $cb = $pkg->can ($name)) {
		638	_attach_cb $registry, $id, $prio, $cb;
		639	}
		640	}
		641
		642	} elsif (exists $cb_id{$type}) {
		643	_attach_cb $registry, $cb_id{$type}, $prio, shift @arg;
		644
		645	} elsif (ref $type) {
		646	warn "attaching objects not supported, ignoring.\n";
		647
		648	} else {
		649	shift @arg;
		650	warn "attach argument '$type' not supported, ignoring.\n";
		651	}
		652	}
		653	}
		654
		655	sub _object_attach {
		656	my ($obj, $name, %arg) = @_;
		657
		658	return if exists $obj->{_attachment}{$name};
		659
		660	if (my $attach = $attachment{$name}) {
		661	my $registry = $obj->registry;
		662
		663	for (@$attach) {
		664	my ($klass, @attach) = @$_;
		665	_attach $registry, $klass, @attach;
		666	}
		667
		668	$obj->{$name} = \%arg;
		669	} else {
		670	warn "object uses attachment '$name' which is not available, postponing.\n";
		671	}
		672
		673	$obj->{_attachment}{$name} = undef;
		674	}
		675
		676	sub cf::attachable::attach {
		677	if (ref $_[0]) {
		678	_object_attach @_;
		679	} else {
		680	_attach shift->_attach_registry, @_;
		681	}
		682	_recalc_want;
		683	};
		684
		685	# all those should be optimised
		686	sub cf::attachable::detach {
		687	my ($obj, $name) = @_;
		688
		689	if (ref $obj) {
		690	delete $obj->{_attachment}{$name};
		691	reattach ($obj);
		692	} else {
		693	Carp::croak "cannot, currently, detach class attachments";
		694	}
		695	_recalc_want;
		696	};
		697
		698	sub cf::attachable::attached {
		699	my ($obj, $name) = @_;
		700
		701	exists $obj->{_attachment}{$name}
		702	}
		703
		704	for my $klass (qw(ATTACHABLE GLOBAL OBJECT PLAYER CLIENT MAP)) {
		705	eval "#line " . __LINE__ . " 'cf.pm'
		706	sub cf::\L$klass\E::_attach_registry {
		707	(\\\@CB_$klass, KLASS_$klass)
		708	}
		709
		710	sub cf::\L$klass\E::attachment {
		711	my \$name = shift;
		712
		713	\$attachment{\$name} = [[KLASS_$klass, \@_]];
		714	}
		715	";
		716	die if $@;
		717	}
		718
		719	our $override;
		720	our @invoke_results = (); # referenced from .xs code. TODO: play tricks with reify and mortals?
		721
		722	sub override {
		723	$override = 1;
		724	@invoke_results = ();
		725	}
		726
		727	sub do_invoke {
		728	my $event = shift;
		729	my $callbacks = shift;
		730
		731	@invoke_results = ();
		732
		733	local $override;
		734
		735	for (@$callbacks) {
		736	eval { &{$_->[1]} };
		737
		738	if ($@) {
		739	warn "$@";
		740	warn "... while processing $EVENT[$event][0](@_) event, skipping processing altogether.\n";
		741	override;
		742	}
		743
		744	return 1 if $override;
		745	}
		746
		747	0
		748	}
		749
		750	=item $bool = cf::global::invoke (EVENT_CLASS_XXX, ...)
		751
		752	=item $bool = $attachable->invoke (EVENT_CLASS_XXX, ...)
		753
		754	Generate an object-specific event with the given arguments.
		755
		756	This API is preliminary (most likely, the EVENT_CLASS_xxx prefix will be
		757	removed in future versions), and there is no public API to access override
		758	results (if you must, access C<@cf::invoke_results> directly).
		759
444	=back	760	=back
445		761
446	=cut	762	=cut
447
448	*cf::object::valid =
449	*cf::player::valid =
450	*cf::map::valid = \&cf::_valid;
451		763
452	#############################################################################	764	#############################################################################
453	# object support	765	# object support
454		766
455	sub instantiate {
456	my ($obj, $data) = @_;
457
458	$data = from_json $data;
459
460	for (@$data) {
461	my ($name, $args) = @$_;
462
463	$obj->attach ($name, %{$args || {} });
464	}
465	}
466
467	# basically do the same as instantiate, without calling instantiate
468	sub reattach {	767	sub reattach {
		768	# basically do the same as instantiate, without calling instantiate
469	my ($obj) = @_;	769	my ($obj) = @_;
		770
		771	bless $obj, ref $obj; # re-bless in case extensions have been reloaded
		772
470	my $registry = $obj->registry;	773	my $registry = $obj->registry;
471		774
472	@$registry = ();	775	@$registry = ();
473		776
474	delete $obj->{_attachment} unless scalar keys %{ $obj->{_attachment} || {} };	777	delete $obj->{_attachment} unless scalar keys %{ $obj->{_attachment} || {} };
475		778
476	for my $name (keys %{ $obj->{_attachment} || {} }) {	779	for my $name (keys %{ $obj->{_attachment} || {} }) {
477	if (my $attach = $attachment{$name}) {	780	if (my $attach = $attachment{$name}) {
478	for (@$attach) {	781	for (@$attach) {
479	my ($klass, @attach) = @$_;	782	my ($klass, @attach) = @$_;
480	_attach @$registry, $klass, @attach;	783	_attach $registry, $klass, @attach;
481	}	784	}
482	} else {	785	} else {
483	warn "object uses attachment '$name' that is not available, postponing.\n";	786	warn "object uses attachment '$name' that is not available, postponing.\n";
484	}	787	}
485	}	788	}
486	}	789	}
487		790
488	sub object_freezer_save {	791	cf::attachable->attach (
489	my ($filename, $rdata, $objs) = @_;
490
491	if (length $$rdata) {
492	warn sprintf "saving %s (%d,%d)\n",
493	$filename, length $$rdata, scalar @$objs;
494
495	if (open my $fh, ">:raw", "$filename~") {
496	chmod SAVE_MODE, $fh;
497	syswrite $fh, $$rdata;
498	close $fh;
499
500	if (@$objs && open my $fh, ">:raw", "$filename.pst~") {
501	chmod SAVE_MODE, $fh;
502	syswrite $fh, Storable::nfreeze { version => 1, objs => $objs };
503	close $fh;
504	rename "$filename.pst~", "$filename.pst";
505	} else {
506	unlink "$filename.pst";
507	}
508
509	rename "$filename~", $filename;
510	} else {
511	warn "FATAL: $filename~: $!\n";
512	}
513	} else {
514	unlink $filename;
515	unlink "$filename.pst";
516	}
517	}
518
519	sub object_thawer_load {
520	my ($filename) = @_;
521
522	local $/;
523
524	my $av;
525
526	#TODO: use sysread etc.
527	if (open my $data, "<:raw:perlio", $filename) {
528	$data = <$data>;
529	if (open my $pst, "<:raw:perlio", "$filename.pst") {
530	$av = eval { (Storable::thaw <$pst>)->{objs} };
531	}
532	return ($data, $av);
533	}
534
535	()
536	}
537
538	attach_to_objects
539	prio => -1000000,	792	prio => -1000000,
		793	on_instantiate => sub {
		794	my ($obj, $data) = @_;
		795
		796	$data = from_json $data;
		797
		798	for (@$data) {
		799	my ($name, $args) = @$_;
		800
		801	$obj->attach ($name, %{$args || {} });
		802	}
		803	},
		804	on_reattach => \&reattach,
540	on_clone => sub {	805	on_clone => sub {
541	my ($src, $dst) = @_;	806	my ($src, $dst) = @_;
542		807
543	@{$dst->registry} = @{$src->registry};	808	@{$dst->registry} = @{$src->registry};
544		809
545	%$dst = %$src;	810	%$dst = %$src;
546		811
547	%{$dst->{_attachment}} = %{$src->{_attachment}}	812	%{$dst->{_attachment}} = %{$src->{_attachment}}
548	if exists $src->{_attachment};	813	if exists $src->{_attachment};
549	},	814	},
550	;	815	);
		816
		817	sub object_freezer_save {
		818	my ($filename, $rdata, $objs) = @_;
		819
		820	sync_job {
		821	if (length $$rdata) {
		822	warn sprintf "saving %s (%d,%d)\n",
		823	$filename, length $$rdata, scalar @$objs;
		824
		825	if (my $fh = aio_open "$filename~", O_WRONLY | O_CREAT, 0600) {
		826	chmod SAVE_MODE, $fh;
		827	aio_write $fh, 0, (length $$rdata), $$rdata, 0;
		828	aio_fsync $fh if $cf::USE_FSYNC;
		829	close $fh;
		830
		831	if (@$objs) {
		832	if (my $fh = aio_open "$filename.pst~", O_WRONLY | O_CREAT, 0600) {
		833	chmod SAVE_MODE, $fh;
		834	my $data = Storable::nfreeze { version => 1, objs => $objs };
		835	aio_write $fh, 0, (length $data), $data, 0;
		836	aio_fsync $fh if $cf::USE_FSYNC;
		837	close $fh;
		838	aio_rename "$filename.pst~", "$filename.pst";
		839	}
		840	} else {
		841	aio_unlink "$filename.pst";
		842	}
		843
		844	aio_rename "$filename~", $filename;
		845	} else {
		846	warn "FATAL: $filename~: $!\n";
		847	}
		848	} else {
		849	aio_unlink $filename;
		850	aio_unlink "$filename.pst";
		851	}
		852	}
		853	}
		854
		855	sub object_freezer_as_string {
		856	my ($rdata, $objs) = @_;
		857
		858	use Data::Dumper;
		859
		860	$$rdata . Dumper $objs
		861	}
		862
		863	sub object_thawer_load {
		864	my ($filename) = @_;
		865
		866	my ($data, $av);
		867
		868	(aio_load $filename, $data) >= 0
		869	or return;
		870
		871	unless (aio_stat "$filename.pst") {
		872	(aio_load "$filename.pst", $av) >= 0
		873	or return;
		874	$av = eval { (Storable::thaw $av)->{objs} };
		875	}
		876
		877	warn sprintf "loading %s (%d)\n",
		878	$filename, length $data, scalar @{$av || []};
		879	return ($data, $av);
		880	}
551		881
552	#############################################################################	882	#############################################################################
553	# old plug-in events	883	# command handling &c
554		884
555	sub inject_event {	885	=item cf::register_command $name => \&callback($ob,$args);
556	my $extension = shift;
557	my $event_code = shift;
558		886
559	my $cb = $hook[$event_code]{$extension}	887	Register a callback for execution when the client sends the user command
560	or return;	888	$name.
561		889
562	&$cb	890	=cut
563	}
564
565	sub inject_global_event {
566	my $event = shift;
567
568	my $cb = $hook[$event]
569	or return;
570
571	List::Util::max map &$_, values %$cb
572	}
573
574	sub inject_command {
575	my ($name, $obj, $params) = @_;
576
577	for my $cmd (@{ $command{$name} }) {
578	$cmd->[1]->($obj, $params);
579	}
580
581	-1
582	}
583		891
584	sub register_command {	892	sub register_command {
585	my ($name, $time, $cb) = @_;	893	my ($name, $cb) = @_;
586		894
587	my $caller = caller;	895	my $caller = caller;
588	#warn "registering command '$name/$time' to '$caller'";	896	#warn "registering command '$name/$time' to '$caller'";
589		897
590	push @{ $command{$name} }, [$time, $cb, $caller];	898	push @{ $COMMAND{$name} }, [$caller, $cb];
591	$COMMAND{"$name\000"} = List::Util::max map $_->[0], @{ $command{$name} };
592	}	899	}
		900
		901	=item cf::register_extcmd $name => \&callback($pl,$packet);
		902
		903	Register a callbackf ro execution when the client sends an extcmd packet.
		904
		905	If the callback returns something, it is sent back as if reply was being
		906	called.
		907
		908	=cut
593		909
594	sub register_extcmd {	910	sub register_extcmd {
595	my ($name, $cb) = @_;	911	my ($name, $cb) = @_;
596		912
597	my $caller = caller;	913	$EXTCMD{$name} = $cb;
598	#warn "registering extcmd '$name' to '$caller'";
599
600	$extcmd{$name} = [$cb, $caller];
601	}	914	}
602		915
603	sub register {	916	cf::player->attach (
604	my ($base, $pkg) = @_;	917	on_command => sub {
		918	my ($pl, $name, $params) = @_;
605		919
606	#TODO	920	my $cb = $COMMAND{$name}
607	}	921	or return;
608		922
609	sub load_extension {	923	for my $cmd (@$cb) {
610	my ($path) = @_;	924	$cmd->[1]->($pl->ob, $params);
611
612	$path =~ /([^\/\\]+)\.ext$/ or die "$path";
613	my $base = $1;
614	my $pkg = $1;
615	$pkg =~ s/[^[:word:]]/_/g;
616	$pkg = "ext::$pkg";
617
618	warn "loading '$path' into '$pkg'\n";
619
620	open my $fh, "<:utf8", $path
621	or die "$path: $!";
622
623	my $source =
624	"package $pkg; use strict; use utf8;\n"
625	. "#line 1 \"$path\"\n{\n"
626	. (do { local $/; <$fh> })
627	. "\n};\n1";
628
629	eval $source
630	or die "$path: $@";
631
632	push @exts, $pkg;
633	$ext_pkg{$base} = $pkg;
634
635	# no strict 'refs';
636	# @{"$pkg\::ISA"} = ext::;
637
638	register $base, $pkg;
639	}
640
641	sub unload_extension {
642	my ($pkg) = @_;
643
644	warn "removing extension $pkg\n";
645
646	# remove hooks
647	#TODO
648	# for my $idx (0 .. $#PLUGIN_EVENT) {
649	# delete $hook[$idx]{$pkg};
650	# }
651
652	# remove commands
653	for my $name (keys %command) {
654	my @cb = grep $_->[2] ne $pkg, @{ $command{$name} };
655
656	if (@cb) {
657	$command{$name} = \@cb;
658	$COMMAND{"$name\000"} = List::Util::max map $_->[0], @cb;
659	} else {
660	delete $command{$name};
661	delete $COMMAND{"$name\000"};
662	}	925	}
		926
		927	cf::override;
663	}	928	},
664
665	# remove extcmds
666	for my $name (grep $extcmd{$_}[1] eq $pkg, keys %extcmd) {
667	delete $extcmd{$name};
668	}
669
670	if (my $cb = $pkg->can ("unload")) {
671	eval {
672	$cb->($pkg);
673	1
674	} or warn "$pkg unloaded, but with errors: $@";
675	}
676
677	Symbol::delete_package $pkg;
678	}
679
680	sub load_extensions {
681	my $LIBDIR = maps_directory "perl";
682
683	for my $ext (<$LIBDIR/*.ext>) {
684	next unless -r $ext;
685	eval {
686	load_extension $ext;
687	1
688	} or warn "$ext not loaded: $@";
689	}
690	}
691
692	#############################################################################
693	# extcmd framework, basically convert ext <msg>
694	# into pkg::->on_extcmd_arg1 (...) while shortcutting a few
695
696	attach_to_players
697	on_extcmd => sub {	929	on_extcmd => sub {
698	my ($pl, $buf) = @_;	930	my ($pl, $buf) = @_;
699		931
700	my $msg = eval { from_json $buf };	932	my $msg = eval { from_json $buf };
701		933
702	if (ref $msg) {	934	if (ref $msg) {
703	if (my $cb = $extcmd{$msg->{msgtype}}) {	935	if (my $cb = $EXTCMD{$msg->{msgtype}}) {
704	if (my %reply = $cb->[0]->($pl, $msg)) {	936	if (my %reply = $cb->($pl, $msg)) {
705	$pl->ext_reply ($msg->{msgid}, %reply);	937	$pl->ext_reply ($msg->{msgid}, %reply);
706	}	938	}
707	}	939	}
708	} else {	940	} else {
709	warn "player " . ($pl->ob->name) . " sent unparseable ext message: <$buf>\n";	941	warn "player " . ($pl->ob->name) . " sent unparseable ext message: <$buf>\n";
710	}	942	}
711		943
712	cf::override;	944	cf::override;
713	},	945	},
714	;	946	);
		947
		948	sub load_extensions {
		949	cf::sync_job {
		950	my %todo;
		951
		952	for my $path (<$LIBDIR/*.ext>) {
		953	next unless -r $path;
		954
		955	$path =~ /([^\/\\]+)\.ext$/ or die "$path";
		956	my $base = $1;
		957	my $pkg = $1;
		958	$pkg =~ s/[^[:word:]]/_/g;
		959	$pkg = "ext::$pkg";
		960
		961	open my $fh, "<:utf8", $path
		962	or die "$path: $!";
		963
		964	my $source = do { local $/; <$fh> };
		965
		966	my %ext = (
		967	path => $path,
		968	base => $base,
		969	pkg => $pkg,
		970	);
		971
		972	$ext{meta} = { map { (split /=/, $_, 2)[0, 1] } split /\s+/, $1 }
		973	if $source =~ /\A#!.*?perl.*?#\s*(.*)$/m;
		974
		975	$ext{source} =
		976	"package $pkg; use strict; use utf8;\n"
		977	. "#line 1 \"$path\"\n{\n"
		978	. $source
		979	. "\n};\n1";
		980
		981	$todo{$base} = \%ext;
		982	}
		983
		984	my %done;
		985	while (%todo) {
		986	my $progress;
		987
		988	while (my ($k, $v) = each %todo) {
		989	for (split /,\s*/, $v->{meta}{depends}) {
		990	goto skip
		991	unless exists $done{$_};
		992	}
		993
		994	warn "... loading '$k' into '$v->{pkg}'\n";
		995
		996	unless (eval $v->{source}) {
		997	my $msg = $@ ? "$v->{path}: $@\n"
		998	: "$v->{base}: extension inactive.\n";
		999
		1000	if (exists $v->{meta}{mandatory}) {
		1001	warn $msg;
		1002	warn "mandatory extension failed to load, exiting.\n";
		1003	exit 1;
		1004	}
		1005
		1006	warn $msg;
		1007	}
		1008
		1009	$done{$k} = delete $todo{$k};
		1010	push @EXTS, $v->{pkg};
		1011	$progress = 1;
		1012	}
		1013
		1014	skip:
		1015	die "cannot load " . (join ", ", keys %todo) . ": unable to resolve dependencies\n"
		1016	unless $progress;
		1017	}
		1018	};
		1019	}
715		1020
716	#############################################################################	1021	#############################################################################
717	# load/save/clean perl data associated with a map
718		1022
719	*cf::mapsupport::on_clean = sub {	1023	=head2 CORE EXTENSIONS
		1024
		1025	Functions and methods that extend core crossfire objects.
		1026
		1027	=cut
		1028
		1029	package cf::player;
		1030
		1031	use Coro::AIO;
		1032
		1033	=head3 cf::player
		1034
		1035	=over 4
		1036
		1037	=item cf::player::find $login
		1038
		1039	Returns the given player object, loading it if necessary (might block).
		1040
		1041	=cut
		1042
		1043	sub playerdir($) {
		1044	"$PLAYERDIR/"
		1045	. (ref $_[0] ? $_[0]->ob->name : $_[0])
		1046	}
		1047
		1048	sub path($) {
		1049	my $login = ref $_[0] ? $_[0]->ob->name : $_[0];
		1050
		1051	(playerdir $login) . "/playerdata"
		1052	}
		1053
		1054	sub find_active($) {
		1055	$cf::PLAYER{$_[0]}
		1056	and $cf::PLAYER{$_[0]}->active
		1057	and $cf::PLAYER{$_[0]}
		1058	}
		1059
		1060	sub exists($) {
		1061	my ($login) = @_;
		1062
		1063	$cf::PLAYER{$login}
		1064	or cf::sync_job { !aio_stat path $login }
		1065	}
		1066
		1067	sub find($) {
		1068	return $cf::PLAYER{$_[0]} || do {
		1069	my $login = $_[0];
		1070
		1071	my $guard = cf::lock_acquire "user_find:$login";
		1072
		1073	$cf::PLAYER{$_[0]} || do {
		1074	# rename old playerfiles to new ones
		1075	#TODO: remove when no longer required
		1076	aio_link +(playerdir $login) . "/$login.pl.pst", (playerdir $login) . "/playerdata.pst";
		1077	aio_link +(playerdir $login) . "/$login.pl" , (playerdir $login) . "/playerdata";
		1078	aio_unlink +(playerdir $login) . "/$login.pl.pst";
		1079	aio_unlink +(playerdir $login) . "/$login.pl";
		1080
		1081	my $pl = load_pl path $login
		1082	or return;
		1083	$cf::PLAYER{$login} = $pl
		1084	}
		1085	}
		1086	}
		1087
		1088	sub save($) {
		1089	my ($pl) = @_;
		1090
		1091	return if $pl->{deny_save};
		1092
		1093	my $path = path $pl;
		1094	my $guard = cf::lock_acquire "user_save:$path";
		1095
		1096	return if $pl->{deny_save};
		1097
		1098	aio_mkdir playerdir $pl, 0770;
		1099	$pl->{last_save} = $cf::RUNTIME;
		1100
		1101	$pl->save_pl ($path);
		1102	Coro::cede;
		1103	}
		1104
		1105	sub new($) {
		1106	my ($login) = @_;
		1107
		1108	my $self = create;
		1109
		1110	$self->ob->name ($login);
		1111	$self->{deny_save} = 1;
		1112
		1113	$cf::PLAYER{$login} = $self;
		1114
		1115	$self
		1116	}
		1117
		1118	=item $pl->quit_character
		1119
		1120	Nukes the player without looking back. If logged in, the connection will
		1121	be destroyed. May block for a long time.
		1122
		1123	=cut
		1124
		1125	sub quit_character {
		1126	my ($pl) = @_;
		1127
		1128	my $name = $pl->ob->name;
		1129
		1130	$pl->{deny_save} = 1;
		1131	$pl->password ("*"); # this should lock out the player until we nuked the dir
		1132
		1133	$pl->invoke (cf::EVENT_PLAYER_LOGOUT, 1) if $pl->active;
		1134	$pl->deactivate;
		1135	$pl->invoke (cf::EVENT_PLAYER_QUIT);
		1136	$pl->ns->destroy if $pl->ns;
		1137
		1138	my $path = playerdir $pl;
		1139	my $temp = "$path~$cf::RUNTIME~deleting~";
		1140	aio_rename $path, $temp;
		1141	delete $cf::PLAYER{$pl->ob->name};
		1142	$pl->destroy;
		1143
		1144	my $prefix = qr<^~\Q$name\E/>;
		1145
		1146	# nuke player maps
		1147	$cf::MAP{$_}->nuke for grep /$prefix/, keys %cf::MAP;
		1148
		1149	IO::AIO::aio_rmtree $temp;
		1150	}
		1151
		1152	=item $pl->kick
		1153
		1154	Kicks a player out of the game. This destroys the connection.
		1155
		1156	=cut
		1157
		1158	sub kick {
		1159	my ($pl, $kicker) = @_;
		1160
		1161	$pl->invoke (cf::EVENT_PLAYER_KICK, $kicker);
		1162	$pl->killer ("kicked");
		1163	$pl->ns->destroy;
		1164	}
		1165
		1166	=item cf::player::list_logins
		1167
		1168	Returns am arrayref of all valid playernames in the system, can take a
		1169	while and may block, so not sync_job-capable, ever.
		1170
		1171	=cut
		1172
		1173	sub list_logins {
		1174	my $dirs = aio_readdir $PLAYERDIR
		1175	or return [];
		1176
		1177	my @logins;
		1178
		1179	for my $login (@$dirs) {
		1180	my $fh = aio_open path $login, Fcntl::O_RDONLY, 0 or next;
		1181	aio_read $fh, 0, 512, my $buf, 0 or next;
		1182	$buf !~ /^password -------------$/m or next; # official not-valid tag
		1183
		1184	utf8::decode $login;
		1185	push @logins, $login;
		1186	}
		1187
		1188	\@logins
		1189	}
		1190
		1191	=item $player->maps
		1192
		1193	Returns an arrayref of map paths that are private for this
		1194	player. May block.
		1195
		1196	=cut
		1197
		1198	sub maps($) {
		1199	my ($pl) = @_;
		1200
		1201	$pl = ref $pl ? $pl->ob->name : $pl;
		1202
		1203	my $files = aio_readdir playerdir $pl
		1204	or return;
		1205
		1206	my @paths;
		1207
		1208	for (@$files) {
		1209	utf8::decode $_;
		1210	next if /\.(?:pl|pst)$/;
		1211	next unless /^$PATH_SEP/o;
		1212
		1213	push @paths, cf::map::normalise "~$pl/$_";
		1214	}
		1215
		1216	\@paths
		1217	}
		1218
		1219	=item $player->ext_reply ($msgid, %msg)
		1220
		1221	Sends an ext reply to the player.
		1222
		1223	=cut
		1224
		1225	sub ext_reply($$%) {
		1226	my ($self, $id, %msg) = @_;
		1227
		1228	$msg{msgid} = $id;
		1229
		1230	$self->send ("ext " . cf::to_json \%msg);
		1231	}
		1232
		1233	=item $player->ext_event ($type, %msg)
		1234
		1235	Sends an ext event to the client.
		1236
		1237	=cut
		1238
		1239	sub ext_event($$%) {
		1240	my ($self, $type, %msg) = @_;
		1241
		1242	$self->ns->ext_event ($type, %msg);
		1243	}
		1244
		1245	=head3 cf::region
		1246
		1247	=over 4
		1248
		1249	=cut
		1250
		1251	package cf::region;
		1252
		1253	=item cf::region::find_by_path $path
		1254
		1255	Tries to decuce the probable region for a map knowing only its path.
		1256
		1257	=cut
		1258
		1259	sub find_by_path($) {
		1260	my ($path) = @_;
		1261
		1262	my ($match, $specificity);
		1263
		1264	for my $region (list) {
		1265	if ($region->match && $path =~ $region->match) {
		1266	($match, $specificity) = ($region, $region->specificity)
		1267	if $region->specificity > $specificity;
		1268	}
		1269	}
		1270
		1271	$match
		1272	}
		1273
		1274	=back
		1275
		1276	=head3 cf::map
		1277
		1278	=over 4
		1279
		1280	=cut
		1281
		1282	package cf::map;
		1283
		1284	use Fcntl;
		1285	use Coro::AIO;
		1286
		1287	use overload
		1288	'""' => \&as_string,
		1289	fallback => 1;
		1290
		1291	our $MAX_RESET = 3600;
		1292	our $DEFAULT_RESET = 3000;
		1293
		1294	sub generate_random_map {
		1295	my ($self, $rmp) = @_;
		1296	# mit "rum" bekleckern, nicht
		1297	$self->_create_random_map (
		1298	$rmp->{wallstyle}, $rmp->{wall_name}, $rmp->{floorstyle}, $rmp->{monsterstyle},
		1299	$rmp->{treasurestyle}, $rmp->{layoutstyle}, $rmp->{doorstyle}, $rmp->{decorstyle},
		1300	$rmp->{origin_map}, $rmp->{final_map}, $rmp->{exitstyle}, $rmp->{this_map},
		1301	$rmp->{exit_on_final_map},
		1302	$rmp->{xsize}, $rmp->{ysize},
		1303	$rmp->{expand2x}, $rmp->{layoutoptions1}, $rmp->{layoutoptions2}, $rmp->{layoutoptions3},
		1304	$rmp->{symmetry}, $rmp->{difficulty}, $rmp->{difficulty_given}, $rmp->{difficulty_increase},
		1305	$rmp->{dungeon_level}, $rmp->{dungeon_depth}, $rmp->{decoroptions}, $rmp->{orientation},
		1306	$rmp->{origin_y}, $rmp->{origin_x}, $rmp->{random_seed}, $rmp->{total_map_hp},
		1307	$rmp->{map_layout_style}, $rmp->{treasureoptions}, $rmp->{symmetry_used},
		1308	(cf::region::find $rmp->{region}), $rmp->{custom}
		1309	)
		1310	}
		1311
		1312	=item cf::map->register ($regex, $prio)
		1313
		1314	Register a handler for the map path matching the given regex at the
		1315	givne priority (higher is better, built-in handlers have priority 0, the
		1316	default).
		1317
		1318	=cut
		1319
		1320	sub register {
		1321	my (undef, $regex, $prio) = @_;
		1322	my $pkg = caller;
		1323
		1324	no strict;
		1325	push @{"$pkg\::ISA"}, __PACKAGE__;
		1326
		1327	$EXT_MAP{$pkg} = [$prio, qr<$regex>];
		1328	}
		1329
		1330	# also paths starting with '/'
		1331	$EXT_MAP{"cf::map"} = [0, qr{^(?=/)}];
		1332
		1333	sub thawer_merge {
		1334	my ($self, $merge) = @_;
		1335
		1336	# we have to keep some variables in memory intact
		1337	local $self->{path};
		1338	local $self->{load_path};
		1339
		1340	$self->SUPER::thawer_merge ($merge);
		1341	}
		1342
		1343	sub normalise {
		1344	my ($path, $base) = @_;
		1345
		1346	$path = "$path"; # make sure its a string
		1347
		1348	$path =~ s/\.map$//;
		1349
		1350	# map plan:
		1351	#
		1352	# /! non-realised random map exit (special hack!)
		1353	# {... are special paths that are not being touched
		1354	# ?xxx/... are special absolute paths
		1355	# ?random/... random maps
		1356	# /... normal maps
		1357	# ~user/... per-player map of a specific user
		1358
		1359	$path =~ s/$PATH_SEP/\//go;
		1360
		1361	# treat it as relative path if it starts with
		1362	# something that looks reasonable
		1363	if ($path =~ m{^(?:\./|\.\./|\w)}) {
		1364	$base or Carp::carp "normalise called with relative path and no base: '$path'";
		1365
		1366	$base =~ s{[^/]+/?$}{};
		1367	$path = "$base/$path";
		1368	}
		1369
		1370	for ($path) {
		1371	redo if s{//}{/};
		1372	redo if s{/\.?/}{/};
		1373	redo if s{/[^/]+/\.\./}{/};
		1374	}
		1375
		1376	$path
		1377	}
		1378
		1379	sub new_from_path {
		1380	my (undef, $path, $base) = @_;
		1381
		1382	return $path if UNIVERSAL::isa $path, "cf::map"; # already a map object
		1383
		1384	$path = normalise $path, $base;
		1385
		1386	for my $pkg (sort { $EXT_MAP{$b}[0] <=> $EXT_MAP{$a}[0] } keys %EXT_MAP) {
		1387	if ($path =~ $EXT_MAP{$pkg}[1]) {
		1388	my $self = bless cf::map::new, $pkg;
		1389	$self->{path} = $path; $self->path ($path);
		1390	$self->init; # pass $1 etc.
		1391	return $self;
		1392	}
		1393	}
		1394
		1395	Carp::carp "unable to resolve path '$path' (base '$base').";
		1396	()
		1397	}
		1398
		1399	sub init {
		1400	my ($self) = @_;
		1401
		1402	$self
		1403	}
		1404
		1405	sub as_string {
		1406	my ($self) = @_;
		1407
		1408	"$self->{path}"
		1409	}
		1410
		1411	# the displayed name, this is a one way mapping
		1412	sub visible_name {
		1413	&as_string
		1414	}
		1415
		1416	# the original (read-only) location
		1417	sub load_path {
		1418	my ($self) = @_;
		1419
		1420	"$MAPDIR/$self->{path}.map"
		1421	}
		1422
		1423	# the temporary/swap location
		1424	sub save_path {
		1425	my ($self) = @_;
		1426
		1427	(my $path = $_[0]{path}) =~ s/\//$PATH_SEP/g;
		1428	"$TMPDIR/$path.map"
		1429	}
		1430
		1431	# the unique path, undef == no special unique path
		1432	sub uniq_path {
		1433	my ($self) = @_;
		1434
		1435	(my $path = $_[0]{path}) =~ s/\//$PATH_SEP/g;
		1436	"$UNIQUEDIR/$path"
		1437	}
		1438
		1439	# and all this just because we cannot iterate over
		1440	# all maps in C++...
		1441	sub change_all_map_light {
		1442	my ($change) = @_;
		1443
		1444	$_->change_map_light ($change)
		1445	for grep $_->outdoor, values %cf::MAP;
		1446	}
		1447
		1448	sub decay_objects {
		1449	my ($self) = @_;
		1450
		1451	return if $self->{deny_reset};
		1452
		1453	$self->do_decay_objects;
		1454	}
		1455
		1456	sub unlink_save {
		1457	my ($self) = @_;
		1458
		1459	utf8::encode (my $save = $self->save_path);
		1460	IO::AIO::aioreq_pri 4; Coro::AIO::aio_unlink $save;
		1461	IO::AIO::aioreq_pri 4; Coro::AIO::aio_unlink "$save.pst";
		1462	}
		1463
		1464	sub load_header_from($) {
		1465	my ($self, $path) = @_;
		1466
		1467	utf8::encode $path;
		1468	#aio_open $path, O_RDONLY, 0
		1469	# or return;
		1470
		1471	$self->_load_header ($path)
		1472	or return;
		1473
		1474	$self->{load_path} = $path;
		1475
		1476	1
		1477	}
		1478
		1479	sub load_header_orig {
		1480	my ($self) = @_;
		1481
		1482	$self->load_header_from ($self->load_path)
		1483	}
		1484
		1485	sub load_header_temp {
		1486	my ($self) = @_;
		1487
		1488	$self->load_header_from ($self->save_path)
		1489	}
		1490
		1491	sub prepare_temp {
		1492	my ($self) = @_;
		1493
		1494	$self->last_access ((delete $self->{last_access})
		1495	|| $cf::RUNTIME); #d#
		1496	# safety
		1497	$self->{instantiate_time} = $cf::RUNTIME
		1498	if $self->{instantiate_time} > $cf::RUNTIME;
		1499	}
		1500
		1501	sub prepare_orig {
		1502	my ($self) = @_;
		1503
		1504	$self->{load_original} = 1;
		1505	$self->{instantiate_time} = $cf::RUNTIME;
		1506	$self->last_access ($cf::RUNTIME);
		1507	$self->instantiate;
		1508	}
		1509
		1510	sub load_header {
		1511	my ($self) = @_;
		1512
		1513	if ($self->load_header_temp) {
		1514	$self->prepare_temp;
		1515	} else {
		1516	$self->load_header_orig
		1517	or return;
		1518	$self->prepare_orig;
		1519	}
		1520
		1521	$self->{deny_reset} = 1
		1522	if $self->no_reset;
		1523
		1524	$self->default_region (cf::region::find_by_path $self->{path})
		1525	unless $self->default_region;
		1526
		1527	1
		1528	}
		1529
		1530	sub find;
		1531	sub find {
		1532	my ($path, $origin) = @_;
		1533
		1534	$path = normalise $path, $origin && $origin->path;
		1535
		1536	cf::lock_wait "map_find:$path";
		1537
		1538	$cf::MAP{$path} || do {
		1539	my $guard = cf::lock_acquire "map_find:$path";
		1540	my $map = new_from_path cf::map $path
		1541	or return;
		1542
		1543	$map->{last_save} = $cf::RUNTIME;
		1544
		1545	$map->load_header
		1546	or return;
		1547
		1548	if ($map->should_reset) {#d#TODO# disabled, crashy (locking issue?)
		1549	# doing this can freeze the server in a sync job, obviously
		1550	#$cf::WAIT_FOR_TICK->wait;
		1551	$map->reset;
		1552	undef $guard;
		1553	return find $path;
		1554	}
		1555
		1556	$cf::MAP{$path} = $map
		1557	}
		1558	}
		1559
		1560	sub pre_load { }
		1561	sub post_load { }
		1562
		1563	sub load {
		1564	my ($self) = @_;
		1565
		1566	local $self->{deny_reset} = 1; # loading can take a long time
		1567
		1568	my $path = $self->{path};
		1569
		1570	{
		1571	my $guard = cf::lock_acquire "map_load:$path";
		1572
		1573	return if $self->in_memory != cf::MAP_SWAPPED;
		1574
		1575	$self->in_memory (cf::MAP_LOADING);
		1576
		1577	$self->alloc;
		1578
		1579	$self->pre_load;
		1580	Coro::cede;
		1581
		1582	$self->_load_objects ($self->{load_path}, 1)
		1583	or return;
		1584
		1585	$self->set_object_flag (cf::FLAG_OBJ_ORIGINAL, 1)
		1586	if delete $self->{load_original};
		1587
		1588	if (my $uniq = $self->uniq_path) {
		1589	utf8::encode $uniq;
		1590	if (aio_open $uniq, O_RDONLY, 0) {
		1591	$self->clear_unique_items;
		1592	$self->_load_objects ($uniq, 0);
		1593	}
		1594	}
		1595
		1596	Coro::cede;
		1597	# now do the right thing for maps
		1598	$self->link_multipart_objects;
		1599	$self->difficulty ($self->estimate_difficulty)
		1600	unless $self->difficulty;
		1601	Coro::cede;
		1602
		1603	unless ($self->{deny_activate}) {
		1604	$self->decay_objects;
		1605	$self->fix_auto_apply;
		1606	$self->update_buttons;
		1607	Coro::cede;
		1608	$self->set_darkness_map;
		1609	Coro::cede;
		1610	$self->activate;
		1611	}
		1612
		1613	$self->in_memory (cf::MAP_IN_MEMORY);
		1614	}
		1615
		1616	$self->post_load;
		1617	}
		1618
		1619	sub customise_for {
		1620	my ($self, $ob) = @_;
		1621
		1622	return find "~" . $ob->name . "/" . $self->{path}
		1623	if $self->per_player;
		1624
		1625	# return find "?party/" . $ob->name . "/" . $self->{path}
		1626	# if $self->per_party;
		1627
		1628	$self
		1629	}
		1630
		1631	# find and load all maps in the 3x3 area around a map
		1632	sub load_diag {
720	my ($map) = @_;	1633	my ($map) = @_;
721		1634
722	my $path = $map->tmpname;	1635	my @diag; # diagonal neighbours
723	defined $path or return;
724		1636
725	unlink "$path.pst";	1637	for (0 .. 3) {
726	};	1638	my $neigh = $map->tile_path ($_)
		1639	or next;
		1640	$neigh = find $neigh, $map
		1641	or next;
		1642	$neigh->load;
727		1643
728	attach_to_maps prio => -10000, package => cf::mapsupport::;	1644	push @diag, [$neigh->tile_path (($_ + 3) % 4), $neigh],
		1645	[$neigh->tile_path (($_ + 1) % 4), $neigh];
		1646	}
729		1647
730	#############################################################################	1648	for (@diag) {
731	# load/save perl data associated with player->ob objects	1649	my $neigh = find @$_
732		1650	or next;
733	sub all_objects(@) {	1651	$neigh->load;
734	@_, map all_objects ($_->inv), @_	1652	}
735	}	1653	}
736		1654
737	# TODO: compatibility cruft, remove when no longer needed	1655	sub find_sync {
738	attach_to_players	1656	my ($path, $origin) = @_;
739	on_load => sub {
740	my ($pl, $path) = @_;
741		1657
742	for my $o (all_objects $pl->ob) {	1658	cf::sync_job { find $path, $origin }
743	if (my $value = $o->get_ob_key_value ("_perl_data")) {	1659	}
744	$o->set_ob_key_value ("_perl_data");
745		1660
746	%$o = %{ Storable::thaw pack "H*", $value };	1661	sub do_load_sync {
		1662	my ($map) = @_;
		1663
		1664	cf::sync_job { $map->load };
		1665	}
		1666
		1667	our %MAP_PREFETCH;
		1668	our $MAP_PREFETCHER = undef;
		1669
		1670	sub find_async {
		1671	my ($path, $origin) = @_;
		1672
		1673	$path = normalise $path, $origin && $origin->{path};
		1674
		1675	if (my $map = $cf::MAP{$path}) {
		1676	return $map if $map->in_memory == cf::MAP_IN_MEMORY;
		1677	}
		1678
		1679	undef $MAP_PREFETCH{$path};
		1680	$MAP_PREFETCHER ||= cf::async {
		1681	while (%MAP_PREFETCH) {
		1682	for my $path (keys %MAP_PREFETCH) {
		1683	my $map = find $path
		1684	or next;
		1685	$map->load;
		1686
		1687	delete $MAP_PREFETCH{$path};
747	}	1688	}
748	}	1689	}
		1690	undef $MAP_PREFETCHER;
		1691	};
		1692	$MAP_PREFETCHER->prio (6);
		1693
		1694	()
		1695	}
		1696
		1697	sub save {
		1698	my ($self) = @_;
		1699
		1700	my $lock = cf::lock_acquire "map_data:" . $self->path;
		1701
		1702	$self->{last_save} = $cf::RUNTIME;
		1703
		1704	return unless $self->dirty;
		1705
		1706	my $save = $self->save_path; utf8::encode $save;
		1707	my $uniq = $self->uniq_path; utf8::encode $uniq;
		1708
		1709	$self->{load_path} = $save;
		1710
		1711	return if $self->{deny_save};
		1712
		1713	local $self->{last_access} = $self->last_access;#d#
		1714
		1715	cf::async {
		1716	$_->contr->save for $self->players;
		1717	};
		1718
		1719	if ($uniq) {
		1720	$self->_save_objects ($save, cf::IO_HEADER | cf::IO_OBJECTS);
		1721	$self->_save_objects ($uniq, cf::IO_UNIQUES);
		1722	} else {
		1723	$self->_save_objects ($save, cf::IO_HEADER | cf::IO_OBJECTS | cf::IO_UNIQUES);
749	},	1724	}
750	;	1725	}
751		1726
752	#############################################################################	1727	sub swap_out {
		1728	my ($self) = @_;
753		1729
754	=head2 CORE EXTENSIONS	1730	# save first because save cedes
		1731	$self->save;
755		1732
756	Functions and methods that extend core crossfire objects.	1733	my $lock = cf::lock_acquire "map_data:" . $self->path;
		1734
		1735	return if $self->players;
		1736	return if $self->in_memory != cf::MAP_IN_MEMORY;
		1737	return if $self->{deny_save};
		1738
		1739	$self->clear;
		1740	$self->in_memory (cf::MAP_SWAPPED);
		1741	}
		1742
		1743	sub reset_at {
		1744	my ($self) = @_;
		1745
		1746	# TODO: safety, remove and allow resettable per-player maps
		1747	return 1e99 if $self->{deny_reset};
		1748
		1749	my $time = $self->fixed_resettime ? $self->{instantiate_time} : $self->last_access;
		1750	my $to = List::Util::min $MAX_RESET, $self->reset_timeout || $DEFAULT_RESET;
		1751
		1752	$time + $to
		1753	}
		1754
		1755	sub should_reset {
		1756	my ($self) = @_;
		1757
		1758	$self->reset_at <= $cf::RUNTIME
		1759	}
		1760
		1761	sub reset {
		1762	my ($self) = @_;
		1763
		1764	my $lock = cf::lock_acquire "map_data:$self->{path}";
		1765
		1766	return if $self->players;
		1767
		1768	warn "resetting map ", $self->path;
		1769
		1770	$self->in_memory (cf::MAP_SWAPPED);
		1771
		1772	# need to save uniques path
		1773	unless ($self->{deny_save}) {
		1774	my $uniq = $self->uniq_path; utf8::encode $uniq;
		1775
		1776	$self->_save_objects ($uniq, cf::IO_UNIQUES)
		1777	if $uniq;
		1778	}
		1779
		1780	delete $cf::MAP{$self->path};
		1781
		1782	$self->clear;
		1783
		1784	$_->clear_links_to ($self) for values %cf::MAP;
		1785
		1786	$self->unlink_save;
		1787	$self->destroy;
		1788	}
		1789
		1790	my $nuke_counter = "aaaa";
		1791
		1792	sub nuke {
		1793	my ($self) = @_;
		1794
		1795	delete $cf::MAP{$self->path};
		1796
		1797	$self->unlink_save;
		1798
		1799	bless $self, "cf::map";
		1800	delete $self->{deny_reset};
		1801	$self->{deny_save} = 1;
		1802	$self->reset_timeout (1);
		1803	$self->path ($self->{path} = "{nuke}/" . ($nuke_counter++));
		1804
		1805	$cf::MAP{$self->path} = $self;
		1806
		1807	$self->reset; # polite request, might not happen
		1808	}
		1809
		1810	=item $maps = cf::map::tmp_maps
		1811
		1812	Returns an arrayref with all map paths of currently instantiated and saved
		1813	maps. May block.
		1814
		1815	=cut
		1816
		1817	sub tmp_maps() {
		1818	[
		1819	map {
		1820	utf8::decode $_;
		1821	/\.map$/
		1822	? normalise $_
		1823	: ()
		1824	} @{ aio_readdir $TMPDIR or [] }
		1825	]
		1826	}
		1827
		1828	=item $maps = cf::map::random_maps
		1829
		1830	Returns an arrayref with all map paths of currently instantiated and saved
		1831	random maps. May block.
		1832
		1833	=cut
		1834
		1835	sub random_maps() {
		1836	[
		1837	map {
		1838	utf8::decode $_;
		1839	/\.map$/
		1840	? normalise "?random/$_"
		1841	: ()
		1842	} @{ aio_readdir $RANDOMDIR or [] }
		1843	]
		1844	}
		1845
		1846	=item cf::map::unique_maps
		1847
		1848	Returns an arrayref of paths of all shared maps that have
		1849	instantiated unique items. May block.
		1850
		1851	=cut
		1852
		1853	sub unique_maps() {
		1854	[
		1855	map {
		1856	utf8::decode $_;
		1857	/\.map$/
		1858	? normalise $_
		1859	: ()
		1860	} @{ aio_readdir $UNIQUEDIR or [] }
		1861	]
		1862	}
		1863
		1864	package cf;
		1865
		1866	=back
		1867
		1868	=head3 cf::object
		1869
		1870	=cut
		1871
		1872	package cf::object;
757		1873
758	=over 4	1874	=over 4
759		1875
760	=item cf::player::exists $login	1876	=item $ob->inv_recursive
761		1877
762	Returns true when the given account exists.	1878	Returns the inventory of the object _and_ their inventories, recursively.
763		1879
764	=cut	1880	=cut
765		1881
766	sub cf::player::exists($) {	1882	sub inv_recursive_;
767	cf::player::find $_[0]	1883	sub inv_recursive_ {
768	or -f sprintf "%s/%s/%s/%s.pl", cf::localdir, cf::playerdir, ($_[0]) x 2;	1884	map { $_, inv_recursive_ $_->inv } @_
769	}	1885	}
770		1886
		1887	sub inv_recursive {
		1888	inv_recursive_ inv $_[0]
		1889	}
		1890
		1891	package cf;
		1892
		1893	=back
		1894
		1895	=head3 cf::object::player
		1896
		1897	=over 4
		1898
771	=item $player->reply ($npc, $msg[, $flags])	1899	=item $player_object->reply ($npc, $msg[, $flags])
772		1900
773	Sends a message to the player, as if the npc C<$npc> replied. C<$npc>	1901	Sends a message to the player, as if the npc C<$npc> replied. C<$npc>
774	can be C<undef>. Does the right thing when the player is currently in a	1902	can be C<undef>. Does the right thing when the player is currently in a
775	dialogue with the given NPC character.	1903	dialogue with the given NPC character.
776		1904
777	=cut	1905	=cut
778		1906
779	# rough implementation of a future "reply" method that works	1907	# rough implementation of a future "reply" method that works
780	# with dialog boxes.	1908	# with dialog boxes.
		1909	#TODO: the first argument must go, split into a $npc->reply_to ( method
781	sub cf::object::player::reply($$$;$) {	1910	sub cf::object::player::reply($$$;$) {
782	my ($self, $npc, $msg, $flags) = @_;	1911	my ($self, $npc, $msg, $flags) = @_;
783		1912
784	$flags = cf::NDI_BROWN | cf::NDI_UNIQUE unless @_ >= 4;	1913	$flags = cf::NDI_BROWN | cf::NDI_UNIQUE unless @_ >= 4;
785		1914
…		…
789	$msg = $npc->name . " says: $msg" if $npc;	1918	$msg = $npc->name . " says: $msg" if $npc;
790	$self->message ($msg, $flags);	1919	$self->message ($msg, $flags);
791	}	1920	}
792	}	1921	}
793		1922
794	=item $player->ext_reply ($msgid, $msgtype, %msg)	1923	=item $player_object->may ("access")
795		1924
796	Sends an ext reply to the player.	1925	Returns wether the given player is authorized to access resource "access"
		1926	(e.g. "command_wizcast").
797		1927
798	=cut	1928	=cut
799		1929
800	sub cf::player::ext_reply($$$%) {	1930	sub cf::object::player::may {
		1931	my ($self, $access) = @_;
		1932
		1933	$self->flag (cf::FLAG_WIZ) ||
		1934	(ref $cf::CFG{"may_$access"}
		1935	? scalar grep $self->name eq $_, @{$cf::CFG{"may_$access"}}
		1936	: $cf::CFG{"may_$access"})
		1937	}
		1938
		1939	=item $player_object->enter_link
		1940
		1941	Freezes the player and moves him/her to a special map (C<{link}>).
		1942
		1943	The player should be reasonably safe there for short amounts of time. You
		1944	I<MUST> call C<leave_link> as soon as possible, though.
		1945
		1946	Will never block.
		1947
		1948	=item $player_object->leave_link ($map, $x, $y)
		1949
		1950	Moves the player out of the special C<{link}> map onto the specified
		1951	map. If the map is not valid (or omitted), the player will be moved back
		1952	to the location he/she was before the call to C<enter_link>, or, if that
		1953	fails, to the emergency map position.
		1954
		1955	Might block.
		1956
		1957	=cut
		1958
		1959	sub link_map {
		1960	unless ($LINK_MAP) {
		1961	$LINK_MAP = cf::map::find "{link}"
		1962	or cf::cleanup "FATAL: unable to provide {link} map, exiting.";
		1963	$LINK_MAP->load;
		1964	}
		1965
		1966	$LINK_MAP
		1967	}
		1968
		1969	sub cf::object::player::enter_link {
		1970	my ($self) = @_;
		1971
		1972	$self->deactivate_recursive;
		1973
		1974	return if UNIVERSAL::isa $self->map, "ext::map_link";
		1975
		1976	$self->{_link_pos} ||= [$self->map->{path}, $self->x, $self->y]
		1977	if $self->map && $self->map->{path} ne "{link}";
		1978
		1979	$self->enter_map ($LINK_MAP || link_map, 10, 10);
		1980	}
		1981
		1982	sub cf::object::player::leave_link {
		1983	my ($self, $map, $x, $y) = @_;
		1984
		1985	return unless $self->contr->active;
		1986
		1987	my $link_pos = delete $self->{_link_pos};
		1988
		1989	unless ($map) {
		1990	# restore original map position
		1991	($map, $x, $y) = @{ $link_pos || [] };
		1992	$map = cf::map::find $map;
		1993
		1994	unless ($map) {
		1995	($map, $x, $y) = @$EMERGENCY_POSITION;
		1996	$map = cf::map::find $map
		1997	or die "FATAL: cannot load emergency map\n";
		1998	}
		1999	}
		2000
		2001	($x, $y) = (-1, -1)
		2002	unless (defined $x) && (defined $y);
		2003
		2004	# use -1 or undef as default coordinates, not 0, 0
		2005	($x, $y) = ($map->enter_x, $map->enter_y)
		2006	if $x <=0 && $y <= 0;
		2007
		2008	$map->load;
		2009	$map->load_diag;
		2010
		2011	return unless $self->contr->active;
		2012	$self->activate_recursive;
		2013
		2014	local $self->{_prev_pos} = $link_pos; # ugly hack for rent.ext
		2015	$self->enter_map ($map, $x, $y);
		2016	}
		2017
		2018	=item $player_object->goto ($path, $x, $y[, $check->($map)])
		2019
		2020	Moves the player to the given map-path and coordinates by first freezing
		2021	her, loading and preparing them map, calling the provided $check callback
		2022	that has to return the map if sucecssful, and then unfreezes the player on
		2023	the new (success) or old (failed) map position.
		2024
		2025	=cut
		2026
		2027	our $GOTOGEN;
		2028
		2029	sub cf::object::player::goto {
		2030	my ($self, $path, $x, $y, $check) = @_;
		2031
		2032	# do generation counting so two concurrent goto's will be executed in-order
		2033	my $gen = $self->{_goto_generation} = ++$GOTOGEN;
		2034
		2035	$self->enter_link;
		2036
		2037	(async {
		2038	my $map = eval {
		2039	my $map = cf::map::find $path;
		2040
		2041	if ($map) {
		2042	$map = $map->customise_for ($self);
		2043	$map = $check->($map) if $check && $map;
		2044	} else {
		2045	$self->message ("The exit to '$path' is closed", cf::NDI_UNIQUE | cf::NDI_RED);
		2046	}
		2047
		2048	$map
		2049	};
		2050
		2051	if ($@) {
		2052	$self->message ("Something went wrong within the server, please report this incident!", cf::NDI_UNIQUE | cf::NDI_RED);
		2053	LOG llevError | logBacktrace, Carp::longmess $@;
		2054	}
		2055
		2056	if ($gen == $self->{_goto_generation}) {
		2057	delete $self->{_goto_generation};
		2058	$self->leave_link ($map, $x, $y);
		2059	}
		2060	})->prio (1);
		2061	}
		2062
		2063	=item $player_object->enter_exit ($exit_object)
		2064
		2065	=cut
		2066
		2067	sub parse_random_map_params {
		2068	my ($spec) = @_;
		2069
		2070	my $rmp = { # defaults
		2071	xsize => (cf::rndm 15, 40),
		2072	ysize => (cf::rndm 15, 40),
		2073	symmetry => (cf::rndm 1, cf::SYMMETRY_XY),
		2074	#layout => string,
		2075	};
		2076
		2077	for (split /\n/, $spec) {
		2078	my ($k, $v) = split /\s+/, $_, 2;
		2079
		2080	$rmp->{lc $k} = $v if (length $k) && (length $v);
		2081	}
		2082
		2083	$rmp
		2084	}
		2085
		2086	sub prepare_random_map {
		2087	my ($exit) = @_;
		2088
		2089	my $guard = cf::lock_acquire "exit_prepare:$exit";
		2090
		2091	# all this does is basically replace the /! path by
		2092	# a new random map path (?random/...) with a seed
		2093	# that depends on the exit object
		2094
		2095	my $rmp = parse_random_map_params $exit->msg;
		2096
		2097	if ($exit->map) {
		2098	$rmp->{region} = $exit->region->name;
		2099	$rmp->{origin_map} = $exit->map->path;
		2100	$rmp->{origin_x} = $exit->x;
		2101	$rmp->{origin_y} = $exit->y;
		2102	}
		2103
		2104	$rmp->{random_seed} ||= $exit->random_seed;
		2105
		2106	my $data = cf::to_json $rmp;
		2107	my $md5 = Digest::MD5::md5_hex $data;
		2108	my $meta = "$RANDOMDIR/$md5.meta";
		2109
		2110	if (my $fh = aio_open "$meta~", O_WRONLY | O_CREAT, 0666) {
		2111	aio_write $fh, 0, (length $data), $data, 0;
		2112	undef $fh;
		2113	aio_rename "$meta~", $meta;
		2114
		2115	$exit->slaying ("?random/$md5");
		2116	$exit->msg (undef);
		2117	}
		2118	}
		2119
		2120	sub cf::object::player::enter_exit {
		2121	my ($self, $exit) = @_;
		2122
		2123	return unless $self->type == cf::PLAYER;
		2124
		2125	if ($exit->slaying eq "/!") {
		2126	#TODO: this should de-fi-ni-te-ly not be a sync-job
		2127	# the problem is that $exit might not survive long enough
		2128	# so it needs to be done right now, right here
		2129	cf::sync_job { prepare_random_map $exit };
		2130	}
		2131
		2132	my $slaying = cf::map::normalise $exit->slaying, $exit->map && $exit->map->path;
		2133	my $hp = $exit->stats->hp;
		2134	my $sp = $exit->stats->sp;
		2135
		2136	$self->enter_link;
		2137
		2138	(async {
		2139	$self->deactivate_recursive; # just to be sure
		2140	unless (eval {
		2141	$self->goto ($slaying, $hp, $sp);
		2142
		2143	1;
		2144	}) {
		2145	$self->message ("Something went wrong deep within the crossfire server. "
		2146	. "I'll try to bring you back to the map you were before. "
		2147	. "Please report this to the dungeon master!",
		2148	cf::NDI_UNIQUE | cf::NDI_RED);
		2149
		2150	warn "ERROR in enter_exit: $@";
		2151	$self->leave_link;
		2152	}
		2153	})->prio (1);
		2154	}
		2155
		2156	=head3 cf::client
		2157
		2158	=over 4
		2159
		2160	=item $client->send_drawinfo ($text, $flags)
		2161
		2162	Sends a drawinfo packet to the client. Circumvents output buffering so
		2163	should not be used under normal circumstances.
		2164
		2165	=cut
		2166
		2167	sub cf::client::send_drawinfo {
		2168	my ($self, $text, $flags) = @_;
		2169
		2170	utf8::encode $text;
		2171	$self->send_packet (sprintf "drawinfo %d %s", $flags || cf::NDI_BLACK, $text);
		2172	}
		2173
		2174	=item $client->ext_event ($type, %msg)
		2175
		2176	Sends an exti event to the client.
		2177
		2178	=cut
		2179
		2180	sub cf::client::ext_event($$%) {
801	my ($self, $id, %msg) = @_;	2181	my ($self, $type, %msg) = @_;
802		2182
803	$msg{msgid} = $id;	2183	$msg{msgtype} = "event_$type";
804
805	$self->send ("ext " . to_json \%msg);	2184	$self->send_packet ("ext " . cf::to_json \%msg);
806	}	2185	}
		2186
		2187	=item $success = $client->query ($flags, "text", \&cb)
		2188
		2189	Queues a query to the client, calling the given callback with
		2190	the reply text on a reply. flags can be C<cf::CS_QUERY_YESNO>,
		2191	C<cf::CS_QUERY_SINGLECHAR> or C<cf::CS_QUERY_HIDEINPUT> or C<0>.
		2192
		2193	Queries can fail, so check the return code. Or don't, as queries will become
		2194	reliable at some point in the future.
		2195
		2196	=cut
		2197
		2198	sub cf::client::query {
		2199	my ($self, $flags, $text, $cb) = @_;
		2200
		2201	return unless $self->state == ST_PLAYING
		2202	|| $self->state == ST_SETUP
		2203	|| $self->state == ST_CUSTOM;
		2204
		2205	$self->state (ST_CUSTOM);
		2206
		2207	utf8::encode $text;
		2208	push @{ $self->{query_queue} }, [(sprintf "query %d %s", $flags, $text), $cb];
		2209
		2210	$self->send_packet ($self->{query_queue}[0][0])
		2211	if @{ $self->{query_queue} } == 1;
		2212	}
		2213
		2214	cf::client->attach (
		2215	on_reply => sub {
		2216	my ($ns, $msg) = @_;
		2217
		2218	# this weird shuffling is so that direct followup queries
		2219	# get handled first
		2220	my $queue = delete $ns->{query_queue}
		2221	or return; # be conservative, not sure how that can happen, but we saw a crash here
		2222
		2223	(shift @$queue)->[1]->($msg);
		2224	return unless $ns->valid; # temporary(?) workaround for callback destroying socket
		2225
		2226	push @{ $ns->{query_queue} }, @$queue;
		2227
		2228	if (@{ $ns->{query_queue} } == @$queue) {
		2229	if (@$queue) {
		2230	$ns->send_packet ($ns->{query_queue}[0][0]);
		2231	} else {
		2232	$ns->state (ST_PLAYING) if $ns->state == ST_CUSTOM;
		2233	}
		2234	}
		2235	},
		2236	);
		2237
		2238	=item $client->async (\&cb)
		2239
		2240	Create a new coroutine, running the specified callback. The coroutine will
		2241	be automatically cancelled when the client gets destroyed (e.g. on logout,
		2242	or loss of connection).
		2243
		2244	=cut
		2245
		2246	sub cf::client::async {
		2247	my ($self, $cb) = @_;
		2248
		2249	my $coro = &Coro::async ($cb);
		2250
		2251	$coro->on_destroy (sub {
		2252	delete $self->{_coro}{$coro+0};
		2253	});
		2254
		2255	$self->{_coro}{$coro+0} = $coro;
		2256
		2257	$coro
		2258	}
		2259
		2260	cf::client->attach (
		2261	on_destroy => sub {
		2262	my ($ns) = @_;
		2263
		2264	$_->cancel for values %{ (delete $ns->{_coro}) || {} };
		2265	},
		2266	);
807		2267
808	=back	2268	=back
809		2269
810	=cut
811
812	#############################################################################
813		2270
814	=head2 SAFE SCRIPTING	2271	=head2 SAFE SCRIPTING
815		2272
816	Functions that provide a safe environment to compile and execute	2273	Functions that provide a safe environment to compile and execute
817	snippets of perl code without them endangering the safety of the server	2274	snippets of perl code without them endangering the safety of the server
818	itself. Looping constructs, I/O operators and other built-in functionality	2275	itself. Looping constructs, I/O operators and other built-in functionality
819	is not available in the safe scripting environment, and the number of	2276	is not available in the safe scripting environment, and the number of
820	functions and methods that cna be called is greatly reduced.	2277	functions and methods that can be called is greatly reduced.
821		2278
822	=cut	2279	=cut
823		2280
824	our $safe = new Safe "safe";	2281	our $safe = new Safe "safe";
825	our $safe_hole = new Safe::Hole;	2282	our $safe_hole = new Safe::Hole;
…		…
830		2287
831	# here we export the classes and methods available to script code	2288	# here we export the classes and methods available to script code
832		2289
833	=pod	2290	=pod
834		2291
835	The following fucntions and emthods are available within a safe environment:	2292	The following functions and methods are available within a safe environment:
836		2293
837	cf::object contr pay_amount pay_player	2294	cf::object contr pay_amount pay_player map
838	cf::object::player player	2295	cf::object::player player
839	cf::player peaceful	2296	cf::player peaceful
		2297	cf::map trigger
840		2298
841	=cut	2299	=cut
842		2300
843	for (	2301	for (
844	["cf::object" => qw(contr pay_amount pay_player)],	2302	["cf::object" => qw(contr pay_amount pay_player map)],
845	["cf::object::player" => qw(player)],	2303	["cf::object::player" => qw(player)],
846	["cf::player" => qw(peaceful)],	2304	["cf::player" => qw(peaceful)],
		2305	["cf::map" => qw(trigger)],
847	) {	2306	) {
848	no strict 'refs';	2307	no strict 'refs';
849	my ($pkg, @funs) = @$_;	2308	my ($pkg, @funs) = @$_;
850	*{"safe::$pkg\::$_"} = $safe_hole->wrap (\&{"$pkg\::$_"})	2309	*{"safe::$pkg\::$_"} = $safe_hole->wrap (\&{"$pkg\::$_"})
851	for @funs;	2310	for @funs;
…		…
923	#############################################################################	2382	#############################################################################
924		2383
925	=head2 EXTENSION DATABASE SUPPORT	2384	=head2 EXTENSION DATABASE SUPPORT
926		2385
927	Crossfire maintains a very simple database for extension use. It can	2386	Crossfire maintains a very simple database for extension use. It can
928	currently store anything that can be serialised using Storable, which	2387	currently store binary data only (use Compress::LZF::sfreeze_cr/sthaw to
929	excludes objects.	2388	convert to/from binary).
930		2389
931	The parameter C<$family> should best start with the name of the extension	2390	The parameter C<$family> should best start with the name of the extension
932	using it, it should be unique.	2391	using it, it should be unique.
933		2392
934	=over 4	2393	=over 4
935		2394
936	=item $hashref = cf::db_get $family
937
938	Return a hashref for use by the extension C<$family>, which can be
939	modified. After modifications, you have to call C<cf::db_dirty> or
940	C<cf::db_sync>.
941
942	=item $value = cf::db_get $family => $key	2395	=item $value = cf::db_get $family => $key
943		2396
944	Returns a single value from the database	2397	Returns a single value from the database.
945
946	=item cf::db_put $family => $hashref
947
948	Stores the given family hashref into the database. Updates are delayed, if
949	you want the data to be synced to disk immediately, use C<cf::db_sync>.
950		2398
951	=item cf::db_put $family => $key => $value	2399	=item cf::db_put $family => $key => $value
952		2400
953	Stores the given C<$value> in the family hash. Updates are delayed, if you	2401	Stores the given C<$value> in the family.
954	want the data to be synced to disk immediately, use C<cf::db_sync>.
955		2402
956	=item cf::db_dirty
957
958	Marks the database as dirty, to be updated at a later time.
959
960	=item cf::db_sync
961
962	Immediately write the database to disk I<if it is dirty>.
963
964	=cut	2403	=cut
965		2404
966	{	2405	our $DB;
967	my $db;
968	my $path = cf::localdir . "/database.pst";
969		2406
970	sub db_load() {	2407	sub db_init {
971	warn "loading database $path\n";#d# remove later	2408	unless ($DB) {
972	$db = stat $path ? Storable::retrieve $path : { };	2409	$DB = BDB::db_create $DB_ENV;
973	}
974		2410
975	my $pid;	2411	cf::sync_job {
		2412	eval {
		2413	$DB->set_flags (BDB::CHKSUM);
976		2414
977	sub db_save() {	2415	BDB::db_open $DB, undef, "db", undef, BDB::BTREE,
978	warn "saving database $path\n";#d# remove later	2416	BDB::CREATE | BDB::AUTO_COMMIT, 0666;
979	waitpid $pid, 0 if $pid;	2417	cf::cleanup "db_open(db): $!" if $!;
980	if (0 == ($pid = fork)) {	2418	};
981	$db->{_meta}{version} = 1;	2419	cf::cleanup "db_open(db): $@" if $@;
982	Storable::nstore $db, "$path~";
983	rename "$path~", $path;
984	cf::_exit 0 if defined $pid;
985	}	2420	};
986	}
987
988	my $dirty;
989
990	sub db_sync() {
991	db_save if $dirty;
992	undef $dirty;
993	}
994
995	my $idle = Event->idle (min => $TICK * 2.8, max => 10, repeat => 0, cb => sub {
996	db_sync;
997	});	2421	}
		2422	}
998		2423
999	sub db_dirty() {
1000	$dirty = 1;
1001	$idle->start;
1002	}
1003
1004	sub db_get($;$) {	2424	sub db_get($$) {
1005	@_ >= 2	2425	my $key = "$_[0]/$_[1]";
1006	? $db->{$_[0]}{$_[1]}
1007	: ($db->{$_[0]} ||= { })
1008	}
1009		2426
		2427	cf::sync_job {
		2428	BDB::db_get $DB, undef, $key, my $data;
		2429
		2430	$! ? ()
		2431	: $data
		2432	}
		2433	}
		2434
1010	sub db_put($$;$) {	2435	sub db_put($$$) {
1011	if (@_ >= 3) {	2436	BDB::dbreq_pri 4;
1012	$db->{$_[0]}{$_[1]} = $_[2];	2437	BDB::db_put $DB, undef, "$_[0]/$_[1]", $_[2], 0, sub { };
1013	} else {	2438	}
1014	$db->{$_[0]} = $_[1];
1015	}
1016	db_dirty;
1017	}
1018		2439
1019	attach_global	2440	=item cf::cache $id => [$paths...], $processversion => $process
1020	prio => 10000,	2441
1021	on_cleanup => sub {	2442	Generic caching function that returns the value of the resource $id,
1022	db_sync;	2443	caching and regenerating as required.
		2444
		2445	This function can block.
		2446
		2447	=cut
		2448
		2449	sub cache {
		2450	my ($id, $src, $processversion, $process) = @_;
		2451
		2452	my $meta =
		2453	join "\x00",
		2454	$processversion,
		2455	map {
		2456	aio_stat $_
		2457	and Carp::croak "$_: $!";
		2458
		2459	($_, (stat _)[7,9])
		2460	} @$src;
		2461
		2462	my $dbmeta = db_get cache => "$id/meta";
		2463	if ($dbmeta ne $meta) {
		2464	# changed, we may need to process
		2465
		2466	my @data;
		2467	my $md5;
		2468
		2469	for (0 .. $#$src) {
		2470	0 <= aio_load $src->[$_], $data[$_]
		2471	or Carp::croak "$src->[$_]: $!";
1023	},	2472	}
		2473
		2474	# if processing is expensive, check
		2475	# checksum first
		2476	if (1) {
		2477	$md5 =
		2478	join "\x00",
		2479	$processversion,
		2480	map {
		2481	Coro::cede;
		2482	($src->[$_], Digest::MD5::md5_hex $data[$_])
		2483	} 0.. $#$src;
		2484
		2485
		2486	my $dbmd5 = db_get cache => "$id/md5";
		2487	if ($dbmd5 eq $md5) {
		2488	db_put cache => "$id/meta", $meta;
		2489
		2490	return db_get cache => "$id/data";
		2491	}
		2492	}
		2493
		2494	my $t1 = Time::HiRes::time;
		2495	my $data = $process->(\@data);
		2496	my $t2 = Time::HiRes::time;
		2497
		2498	warn "cache: '$id' processed in ", $t2 - $t1, "s\n";
		2499
		2500	db_put cache => "$id/data", $data;
		2501	db_put cache => "$id/md5" , $md5;
		2502	db_put cache => "$id/meta", $meta;
		2503
		2504	return $data;
1024	;	2505	}
		2506
		2507	db_get cache => "$id/data"
		2508	}
		2509
		2510	=item fork_call { }, $args
		2511
		2512	Executes the given code block with the given arguments in a seperate
		2513	process, returning the results. Everything must be serialisable with
		2514	Coro::Storable. May, of course, block. Note that the executed sub may
		2515	never block itself or use any form of Event handling.
		2516
		2517	=cut
		2518
		2519	sub fork_call(&@) {
		2520	my ($cb, @args) = @_;
		2521
		2522	# socketpair my $fh1, my $fh2, Socket::AF_UNIX, Socket::SOCK_STREAM, Socket::PF_UNSPEC
		2523	# or die "socketpair: $!";
		2524	pipe my $fh1, my $fh2
		2525	or die "pipe: $!";
		2526
		2527	if (my $pid = fork) {
		2528	close $fh2;
		2529
		2530	my $res = (Coro::Handle::unblock $fh1)->readline (undef);
		2531	$res = Coro::Storable::thaw $res;
		2532
		2533	waitpid $pid, 0; # should not block anymore, we expect the child to simply behave
		2534
		2535	die $$res unless "ARRAY" eq ref $res;
		2536
		2537	return wantarray ? @$res : $res->[-1];
		2538	} else {
		2539	reset_signals;
		2540	local $SIG{__WARN__};
		2541	local $SIG{__DIE__};
		2542	eval {
		2543	close $fh1;
		2544
		2545	my @res = eval { $cb->(@args) };
		2546	syswrite $fh2, Coro::Storable::freeze +($@ ? \"$@" : \@res);
		2547	};
		2548
		2549	warn $@ if $@;
		2550	_exit 0;
		2551	}
1025	}	2552	}
1026		2553
1027	#############################################################################	2554	#############################################################################
1028	# the server's main()	2555	# the server's init and main functions
		2556
		2557	sub load_facedata($) {
		2558	my ($path) = @_;
		2559
		2560	warn "loading facedata from $path\n";
		2561
		2562	my $facedata;
		2563	0 < aio_load $path, $facedata
		2564	or die "$path: $!";
		2565
		2566	$facedata = Coro::Storable::thaw $facedata;
		2567
		2568	$facedata->{version} == 2
		2569	or cf::cleanup "$path: version mismatch, cannot proceed.";
		2570
		2571	{
		2572	my $faces = $facedata->{faceinfo};
		2573
		2574	while (my ($face, $info) = each %$faces) {
		2575	my $idx = (cf::face::find $face) || cf::face::alloc $face;
		2576	cf::face::set $idx, $info->{visibility}, $info->{magicmap};
		2577	cf::face::set_data $idx, 0, $info->{data32}, $info->{chksum32};
		2578	cf::face::set_data $idx, 1, $info->{data64}, $info->{chksum64};
		2579	Coro::cede;
		2580	}
		2581
		2582	while (my ($face, $info) = each %$faces) {
		2583	next unless $info->{smooth};
		2584	my $idx = cf::face::find $face
		2585	or next;
		2586	if (my $smooth = cf::face::find $info->{smooth}) {
		2587	cf::face::set_smooth $idx, $smooth, $info->{smoothlevel};
		2588	} else {
		2589	warn "smooth face '$info->{smooth}' not found for face '$face'";
		2590	}
		2591	Coro::cede;
		2592	}
		2593	}
		2594
		2595	{
		2596	my $anims = $facedata->{animinfo};
		2597
		2598	while (my ($anim, $info) = each %$anims) {
		2599	cf::anim::set $anim, $info->{frames}, $info->{facings};
		2600	Coro::cede;
		2601	}
		2602
		2603	cf::anim::invalidate_all; # d'oh
		2604	}
		2605
		2606	1
		2607	}
		2608
		2609	sub reload_regions {
		2610	load_resource_file "$MAPDIR/regions"
		2611	or die "unable to load regions file\n";
		2612	}
		2613
		2614	sub reload_facedata {
		2615	load_facedata "$DATADIR/facedata"
		2616	or die "unable to load facedata\n";
		2617	}
		2618
		2619	sub reload_archetypes {
		2620	load_resource_file "$DATADIR/archetypes"
		2621	or die "unable to load archetypes\n";
		2622	}
		2623
		2624	sub reload_treasures {
		2625	load_resource_file "$DATADIR/treasures"
		2626	or die "unable to load treasurelists\n";
		2627	}
		2628
		2629	sub reload_resources {
		2630	warn "reloading resource files...\n";
		2631
		2632	reload_regions;
		2633	reload_facedata;
		2634	#reload_archetypes;#d#
		2635	reload_archetypes;
		2636	reload_treasures;
		2637
		2638	warn "finished reloading resource files\n";
		2639	}
		2640
		2641	sub init {
		2642	reload_resources;
		2643	}
		2644
		2645	sub cfg_load {
		2646	open my $fh, "<:utf8", "$CONFDIR/config"
		2647	or return;
		2648
		2649	local $/;
		2650	*CFG = YAML::Syck::Load <$fh>;
		2651
		2652	$EMERGENCY_POSITION = $CFG{emergency_position} || ["/world/world_105_115", 5, 37];
		2653
		2654	$cf::map::MAX_RESET = $CFG{map_max_reset} if exists $CFG{map_max_reset};
		2655	$cf::map::DEFAULT_RESET = $CFG{map_default_reset} if exists $CFG{map_default_reset};
		2656
		2657	if (exists $CFG{mlockall}) {
		2658	eval {
		2659	$CFG{mlockall} ? eval "mlockall()" : eval "munlockall()"
		2660	and die "WARNING: m(un)lockall failed: $!\n";
		2661	};
		2662	warn $@ if $@;
		2663	}
		2664	}
1029		2665
1030	sub main {	2666	sub main {
		2667	# we must not ever block the main coroutine
		2668	local $Coro::idle = sub {
		2669	Carp::cluck "FATAL: Coro::idle was called, major BUG, use cf::sync_job!\n";#d#
		2670	(async {
		2671	Event::one_event;
		2672	})->prio (Coro::PRIO_MAX);
		2673	};
		2674
1031	db_load;	2675	cfg_load;
		2676	db_init;
1032	load_extensions;	2677	load_extensions;
		2678
		2679	$TICK_WATCHER->start;
1033	Event::loop;	2680	Event::loop;
1034	}	2681	}
1035		2682
1036	#############################################################################	2683	#############################################################################
1037	# initialisation	2684	# initialisation and cleanup
1038		2685
1039	sub _perl_reload(&) {	2686	# install some emergency cleanup handlers
		2687	BEGIN {
		2688	for my $signal (qw(INT HUP TERM)) {
		2689	Event->signal (
		2690	reentrant => 0,
		2691	data => WF_AUTOCANCEL,
		2692	signal => $signal,
		2693	prio => 0,
		2694	cb => sub {
		2695	cf::cleanup "SIG$signal";
		2696	},
		2697	);
		2698	}
		2699	}
		2700
		2701	sub emergency_save() {
		2702	my $freeze_guard = cf::freeze_mainloop;
		2703
		2704	warn "enter emergency perl save\n";
		2705
		2706	cf::sync_job {
		2707	# use a peculiar iteration method to avoid tripping on perl
		2708	# refcount bugs in for. also avoids problems with players
		2709	# and maps saved/destroyed asynchronously.
		2710	warn "begin emergency player save\n";
		2711	for my $login (keys %cf::PLAYER) {
		2712	my $pl = $cf::PLAYER{$login} or next;
		2713	$pl->valid or next;
		2714	$pl->save;
		2715	}
		2716	warn "end emergency player save\n";
		2717
		2718	warn "begin emergency map save\n";
		2719	for my $path (keys %cf::MAP) {
		2720	my $map = $cf::MAP{$path} or next;
		2721	$map->valid or next;
		2722	$map->save;
		2723	}
		2724	warn "end emergency map save\n";
		2725
		2726	warn "begin emergency database checkpoint\n";
		2727	BDB::db_env_txn_checkpoint $DB_ENV;
		2728	warn "end emergency database checkpoint\n";
		2729	};
		2730
		2731	warn "leave emergency perl save\n";
		2732	}
		2733
		2734	sub post_cleanup {
1040	my ($msg) = @_;	2735	my ($make_core) = @_;
1041		2736
1042	$msg->("reloading...");	2737	warn Carp::longmess "post_cleanup backtrace"
		2738	if $make_core;
		2739	}
1043		2740
1044	eval {	2741	sub do_reload_perl() {
1045	# cancel all watchers	2742	# can/must only be called in main
		2743	if ($Coro::current != $Coro::main) {
		2744	warn "can only reload from main coroutine";
		2745	return;
		2746	}
		2747
		2748	warn "reloading...";
		2749
		2750	warn "entering sync_job";
		2751
		2752	cf::sync_job {
		2753	cf::write_runtime; # external watchdog should not bark
		2754	cf::emergency_save;
		2755	cf::write_runtime; # external watchdog should not bark
		2756
		2757	warn "syncing database to disk";
		2758	BDB::db_env_txn_checkpoint $DB_ENV;
		2759
		2760	# if anything goes wrong in here, we should simply crash as we already saved
		2761
		2762	warn "cancelling all WF_AUTOCANCEL watchers";
1046	$_->cancel for Event::all_watchers;	2763	for (Event::all_watchers) {
		2764	$_->cancel if $_->data & WF_AUTOCANCEL;
		2765	}
1047		2766
1048	# unload all extensions	2767	warn "flushing outstanding aio requests";
1049	for (@exts) {	2768	for (;;) {
1050	$msg->("unloading <$_>");	2769	BDB::flush;
1051	unload_extension $_;	2770	IO::AIO::flush;
		2771	Coro::cede;
		2772	last unless IO::AIO::nreqs || BDB::nreqs;
		2773	warn "iterate...";
		2774	}
		2775
		2776	++$RELOAD;
		2777
		2778	warn "cancelling all extension coros";
		2779	$_->cancel for values %EXT_CORO;
		2780	%EXT_CORO = ();
		2781
		2782	warn "removing commands";
		2783	%COMMAND = ();
		2784
		2785	warn "removing ext commands";
		2786	%EXTCMD = ();
		2787
		2788	warn "unloading/nuking all extensions";
		2789	for my $pkg (@EXTS) {
		2790	warn "... unloading $pkg";
		2791
		2792	if (my $cb = $pkg->can ("unload")) {
		2793	eval {
		2794	$cb->($pkg);
		2795	1
		2796	} or warn "$pkg unloaded, but with errors: $@";
1052	}	2797	}
1053		2798
		2799	warn "... nuking $pkg";
		2800	Symbol::delete_package $pkg;
		2801	}
		2802
1054	# unload all modules loaded from $LIBDIR	2803	warn "unloading all perl modules loaded from $LIBDIR";
1055	while (my ($k, $v) = each %INC) {	2804	while (my ($k, $v) = each %INC) {
1056	next unless $v =~ /^\Q$LIBDIR\E\/.*\.pm$/;	2805	next unless $v =~ /^\Q$LIBDIR\E\/.*\.pm$/;
1057		2806
1058	$msg->("removing <$k>");	2807	warn "... unloading $k";
1059	delete $INC{$k};	2808	delete $INC{$k};
1060		2809
1061	$k =~ s/\.pm$//;	2810	$k =~ s/\.pm$//;
1062	$k =~ s/\//::/g;	2811	$k =~ s/\//::/g;
1063		2812
…		…
1066	}	2815	}
1067		2816
1068	Symbol::delete_package $k;	2817	Symbol::delete_package $k;
1069	}	2818	}
1070		2819
1071	# sync database to disk
1072	cf::db_sync;
1073
1074	# get rid of safe::, as good as possible	2820	warn "getting rid of safe::, as good as possible";
1075	Symbol::delete_package "safe::$_"	2821	Symbol::delete_package "safe::$_"
1076	for qw(cf::object cf::object::player cf::player cf::map cf::party cf::region);	2822	for qw(cf::attachable cf::object cf::object::player cf::client cf::player cf::map cf::party cf::region);
1077		2823
1078	# remove register_script_function callbacks
1079	# TODO
1080
1081	# unload cf.pm "a bit"	2824	warn "unloading cf.pm \"a bit\"";
1082	delete $INC{"cf.pm"};	2825	delete $INC{"cf.pm"};
		2826	delete $INC{"cf/pod.pm"};
1083		2827
1084	# don't, removes xs symbols, too,	2828	# don't, removes xs symbols, too,
1085	# and global variables created in xs	2829	# and global variables created in xs
1086	#Symbol::delete_package __PACKAGE__;	2830	#Symbol::delete_package __PACKAGE__;
1087		2831
1088	# reload cf.pm	2832	warn "unload completed, starting to reload now";
		2833
1089	$msg->("reloading cf.pm");	2834	warn "reloading cf.pm";
1090	require cf;	2835	require cf;
		2836	cf::_connect_to_perl; # nominally unnecessary, but cannot hurt
1091		2837
1092	# load database again	2838	warn "loading config and database again";
1093	cf::db_load;	2839	cf::cfg_load;
1094		2840
1095	# load extensions	2841	warn "loading extensions";
1096	$msg->("load extensions");
1097	cf::load_extensions;	2842	cf::load_extensions;
1098		2843
1099	# reattach attachments to objects	2844	warn "reattaching attachments to objects/players";
1100	$msg->("reattach");	2845	_global_reattach; # objects, sockets
1101	_global_reattach;	2846	warn "reattaching attachments to maps";
		2847	reattach $_ for values %MAP;
		2848	warn "reattaching attachments to players";
		2849	reattach $_ for values %PLAYER;
		2850
		2851	warn "leaving sync_job";
		2852
		2853	1
		2854	} or do {
		2855	warn $@;
		2856	warn "error while reloading, exiting.";
		2857	exit 1;
1102	};	2858	};
1103	$msg->($@) if $@;
1104		2859
1105	$msg->("reloaded");	2860	warn "reloaded";
1106	};	2861	};
1107		2862
1108	sub perl_reload() {	2863	our $RELOAD_WATCHER; # used only during reload
1109	_perl_reload {	2864
1110	warn $_[0];	2865	sub reload_perl() {
1111	print "$_[0]\n";	2866	# doing reload synchronously and two reloads happen back-to-back,
		2867	# coro crashes during coro_state_free->destroy here.
		2868
		2869	$RELOAD_WATCHER ||= Event->timer (
		2870	reentrant => 0,
		2871	after => 0,
		2872	data => WF_AUTOCANCEL,
		2873	cb => sub {
		2874	do_reload_perl;
		2875	undef $RELOAD_WATCHER;
		2876	},
1112	};	2877	);
1113	}	2878	}
1114		2879
1115	register_command "perl-reload", 0, sub {	2880	register_command "reload" => sub {
1116	my ($who, $arg) = @_;	2881	my ($who, $arg) = @_;
1117		2882
1118	if ($who->flag (FLAG_WIZ)) {	2883	if ($who->flag (FLAG_WIZ)) {
1119	_perl_reload {	2884	$who->message ("reloading server.");
1120	warn $_[0];	2885	async { reload_perl };
1121	$who->message ($_[0]);	2886	}
		2887	};
		2888
		2889	unshift @INC, $LIBDIR;
		2890
		2891	my $bug_warning = 0;
		2892
		2893	our @WAIT_FOR_TICK;
		2894	our @WAIT_FOR_TICK_BEGIN;
		2895
		2896	sub wait_for_tick {
		2897	return unless $TICK_WATCHER->is_active;
		2898	return if $Coro::current == $Coro::main;
		2899
		2900	my $signal = new Coro::Signal;
		2901	push @WAIT_FOR_TICK, $signal;
		2902	$signal->wait;
		2903	}
		2904
		2905	sub wait_for_tick_begin {
		2906	return unless $TICK_WATCHER->is_active;
		2907	return if $Coro::current == $Coro::main;
		2908
		2909	my $signal = new Coro::Signal;
		2910	push @WAIT_FOR_TICK_BEGIN, $signal;
		2911	$signal->wait;
		2912	}
		2913
		2914	my $min = 1e6;#d#
		2915	my $avg = 10;
		2916	$TICK_WATCHER = Event->timer (
		2917	reentrant => 0,
		2918	parked => 1,
		2919	prio => 0,
		2920	at => $NEXT_TICK || $TICK,
		2921	data => WF_AUTOCANCEL,
		2922	cb => sub {
		2923	if ($Coro::current != $Coro::main) {
		2924	Carp::cluck "major BUG: server tick called outside of main coro, skipping it"
		2925	unless ++$bug_warning > 10;
		2926	return;
		2927	}
		2928
		2929	$NOW = $tick_start = Event::time;
		2930
		2931	cf::server_tick; # one server iteration
		2932
		2933	0 && sync_job {#d#
		2934	for(1..10) {
		2935	my $t = Event::time;
		2936	my $map = my $map = new_from_path cf::map "/tmp/x.map"
		2937	or die;
		2938
		2939	$map->width (50);
		2940	$map->height (50);
		2941	$map->alloc;
		2942	$map->_load_objects ("/tmp/x.map", 1);
		2943	my $t = Event::time - $t;
		2944
		2945	#next unless $t < 0.0013;#d#
		2946	if ($t < $min) {
		2947	$min = $t;
		2948	}
		2949	$avg = $avg * 0.99 + $t * 0.01;
		2950	}
		2951	warn "XXXXXXXXXXXXXXXXXX min $min avg $avg\n";#d#
		2952	exit 0;
		2953	# 2007-05-22 02:33:04.569 min 0.00112509727478027 avg 0.0012259249572477
1122	};	2954	};
1123	}
1124	};
1125		2955
1126	register "<global>", __PACKAGE__;	2956	$RUNTIME += $TICK;
1127
1128	unshift @INC, $LIBDIR;
1129
1130	$TICK_WATCHER = Event->timer (
1131	prio => 1,
1132	at => $NEXT_TICK || 1,
1133	cb => sub {
1134	cf::server_tick; # one server iteration
1135
1136	my $NOW = Event::time;
1137	$NEXT_TICK += $TICK;	2957	$NEXT_TICK += $TICK;
1138		2958
		2959	if ($NOW >= $NEXT_RUNTIME_WRITE) {
		2960	$NEXT_RUNTIME_WRITE = $NOW + 10;
		2961	Coro::async_pool {
		2962	write_runtime
		2963	or warn "ERROR: unable to write runtime file: $!";
		2964	};
		2965	}
		2966
		2967	# my $AFTER = Event::time;
		2968	# warn $AFTER - $NOW;#d#
		2969
		2970	if (my $sig = shift @WAIT_FOR_TICK_BEGIN) {
		2971	$sig->send;
		2972	}
		2973	while (my $sig = shift @WAIT_FOR_TICK) {
		2974	$sig->send;
		2975	}
		2976
		2977	$NOW = Event::time;
		2978
1139	# if we are delayed by four ticks, skip them all	2979	# if we are delayed by four ticks or more, skip them all
1140	$NEXT_TICK = $NOW if $NOW >= $NEXT_TICK + $TICK * 4;	2980	$NEXT_TICK = $NOW if $NOW >= $NEXT_TICK + $TICK * 4;
1141		2981
1142	$TICK_WATCHER->at ($NEXT_TICK);	2982	$TICK_WATCHER->at ($NEXT_TICK);
1143	$TICK_WATCHER->start;	2983	$TICK_WATCHER->start;
		2984
		2985	$LOAD = ($NOW - $tick_start) / $TICK;
		2986	$LOADAVG = $LOADAVG * 0.75 + $LOAD * 0.25;
		2987
		2988	_post_tick;
		2989
		2990
1144	},	2991	},
1145	);	2992	);
1146		2993
		2994	{
		2995	BDB::max_poll_time $TICK * 0.1;
		2996	$BDB_POLL_WATCHER = Event->io (
		2997	reentrant => 0,
		2998	fd => BDB::poll_fileno,
		2999	poll => 'r',
		3000	prio => 0,
		3001	data => WF_AUTOCANCEL,
		3002	cb => \&BDB::poll_cb,
		3003	);
		3004	BDB::min_parallel 8;
		3005
		3006	BDB::set_sync_prepare {
		3007	my $status;
		3008	my $current = $Coro::current;
		3009	(
		3010	sub {
		3011	$status = $!;
		3012	$current->ready; undef $current;
		3013	},
		3014	sub {
		3015	Coro::schedule while defined $current;
		3016	$! = $status;
		3017	},
		3018	)
		3019	};
		3020
		3021	unless ($DB_ENV) {
		3022	$DB_ENV = BDB::db_env_create;
		3023
		3024	cf::sync_job {
		3025	eval {
		3026	BDB::db_env_open
		3027	$DB_ENV,
		3028	$BDBDIR,
		3029	BDB::INIT_LOCK | BDB::INIT_LOG | BDB::INIT_MPOOL | BDB::INIT_TXN
		3030	| BDB::RECOVER | BDB::REGISTER | BDB::USE_ENVIRON | BDB::CREATE,
		3031	0666;
		3032
		3033	cf::cleanup "db_env_open($BDBDIR): $!" if $!;
		3034
		3035	$DB_ENV->set_flags (BDB::AUTO_COMMIT | BDB::REGION_INIT | BDB::TXN_NOSYNC, 1);
		3036	$DB_ENV->set_lk_detect;
		3037	};
		3038
		3039	cf::cleanup "db_env_open(db): $@" if $@;
		3040	};
		3041	}
		3042	}
		3043
		3044	{
		3045	IO::AIO::min_parallel 8;
		3046
		3047	undef $Coro::AIO::WATCHER;
		3048	IO::AIO::max_poll_time $TICK * 0.1;
		3049	$AIO_POLL_WATCHER = Event->io (
		3050	reentrant => 0,
		3051	data => WF_AUTOCANCEL,
		3052	fd => IO::AIO::poll_fileno,
		3053	poll => 'r',
		3054	prio => 6,
		3055	cb => \&IO::AIO::poll_cb,
		3056	);
		3057	}
		3058
		3059	my $_log_backtrace;
		3060
		3061	sub _log_backtrace {
		3062	my ($msg, @addr) = @_;
		3063
		3064	$msg =~ s/\n//;
		3065
		3066	# limit the # of concurrent backtraces
		3067	if ($_log_backtrace < 2) {
		3068	++$_log_backtrace;
		3069	async {
		3070	my @bt = fork_call {
		3071	@addr = map { sprintf "%x", $_ } @addr;
		3072	my $self = (-f "/proc/$$/exe") ? "/proc/$$/exe" : $^X;
		3073	open my $fh, "exec addr2line -C -f -i -e \Q$self\E @addr 2>&1 |"
		3074	or die "addr2line: $!";
		3075
		3076	my @funcs;
		3077	my @res = <$fh>;
		3078	chomp for @res;
		3079	while (@res) {
		3080	my ($func, $line) = splice @res, 0, 2, ();
		3081	push @funcs, "[$func] $line";
		3082	}
		3083
		3084	@funcs
		3085	};
		3086
		3087	LOG llevInfo, "[ABT] $msg\n";
		3088	LOG llevInfo, "[ABT] $_\n" for @bt;
		3089	--$_log_backtrace;
		3090	};
		3091	} else {
		3092	LOG llevInfo, "[ABT] $msg\n";
		3093	LOG llevInfo, "[ABT] [suppressed]\n";
		3094	}
		3095	}
		3096
		3097	# load additional modules
		3098	use cf::pod;
		3099
		3100	END { cf::emergency_save }
		3101
1147	1	3102	1
1148		3103

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